Tag Linux

InfoSec Week 39, 2018

Linux had officially committed to implementing and obeying the Code of Conduct — which is immediately misused to remove top Linux coders.
Some of the Linux developers are now threatening to withdraw the license to all of their code.
https://lulz.com/linux-devs-threaten-killswitch-coc-controversy-1252/

Bug in Twitter sent users' private direct messages to third-party developers who were not authorized to receive them. Some brand accounts should be affected.
https://blog.twitter.com/developer/en_us/topics/tools/2018/details-for-developers-on-Account-Activity-API-bug.html

Qualcomm accuses Apple of stealing chip secrets for the purpose of helping Intel overcome engineering flaws in its chips.
https://www.cnbc.com/2018/09/25/qualcomm-accuses-apple-of-giving-its-chip-secrets-to-intel.html

Australian government pushes for the smartphone spyware implanted by Telco vendors, manufacturers.
https://www.brisbanetimes.com.au/business/companies/spyware-on-phone-fears-as-dutton-pushes-new-security-laws-20180924-p505oc.html

At least the sixth backdoor account was removed from Cisco devices this year.
This time it's "hardcoded credentials" in the Cisco Video Surveillance Manager (VSM) Software.
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180921-vsm

ESET researchers discovered, that the Kodi Media Player add-ons are misused for the cryptocurrency mining malware distribution.
https://www.welivesecurity.com/2018/09/13/kodi-add-ons-launch-cryptomining-campaign/

According to a stackexchange post, "the Chinese police is forcing whole cities to install an Android spyware app Jingwang Weishi.
They are stopping people in the street and detaining those who refuse to install it."
https://security.stackexchange.com/questions/194353/police-forcing-me-to-install-jingwang-spyware-app-how-to-minimize-impact

Researchers proved that the security of PKCS #1 Digital Signatures is as secure as any of its successors like RSA-PSS and RSA Full-Domain.
https://www.schneier.com/blog/archives/2018/09/evidence_for_th.html

There is a novel cache poisoning attack on WiFi by a remote off-path mitm attack vector.
Takes only 30 seconds and is using interesting multi-packet injection for timing side channel inference for injection. Works on Windows, OSX and Linux.
https://www.usenix.org/conference/usenixsecurity18/presentation/chen-weiteng

InfoSec Week 34, 2018

If you are running Linux machines in Microsoft Azure, you should disable built-in wa-linux-agent backdoor that enable root access from Azure console.
https://raymii.org/s/blog/Linux_on_Microsoft_Azure_Disable_this_built_in_root_access_backdoor.html

There is a good blog post by Stuart Schechter about the dark side of the two factor authentication. Highly recommended reading.
https://medium.com/@stuartschechter/before-you-turn-on-two-factor-authentication-27148cc5b9a1

Great research by Eyal Ronen, Kenneth G. Paterson and Adi Shamir demonstrate that adopting pseudo constant time implementations of TLS are not secure against the modified Lucky 13 attack on encryption in CBC-mode. Tested against four fully patched implementations of TLS - Amazon's s2n, GnuTLS, mbed TLS and wolfSSL.
https://eprint.iacr.org/2018/747

Traefik, popular open source reverse proxy and load balancing solution is leaking (CVE-2018-15598) TLS certificate private keys via API.
https://www.bleepingcomputer.com/news/security/cloud-product-accidentally-exposes-users-tls-certificate-private-keys/

Google enrolled Hardware Secure Module to their Cloud Key Management Service. The customers can use it to store their encryption keys with FIPS 140-2 Level 3 security certified devices from now on.
https://cloud.google.com/hsm/

Microsoft Corp said that Russian hackers are targeting U.S. political groups ahead of November’s congressional elections.
https://www.reuters.com/article/us-usa-russia-hackers/russian-hacking-of-conservative-groups-sites-thwarted-microsoft-idUSKCN1L60I0

The WIRED cover story on how Russian NotPetya malware took down Maersk, the world’s largest shipping firm.
https://www.wired.com/story/notpetya-cyberattack-ukraine-russia-code-crashed-the-world/

Kaspersky Lab published analysis of a sophisticated "Dark Tequila" banking malware which is targeting customers in Mexico and other Latin American nations.
https://securelist.com/dark-tequila-anejo/87528/

NSA successfully cracked and listened for years to encrypted networks of Russian Airlines, Al Jazeera, and other “High Potential” targets.
https://theintercept.com/2018/08/15/nsa-vpn-hack-al-jazeera-sidtoday/

Anonymous targeted Spanish Constitutional Court, economy and foreign ministry websites to support Catalonia separatist drive.
https://securityaffairs.co/wordpress/75509/hacking/anonymous-catalonia.html

Red Teaming/Adversary Simulation Toolkit is a collection of open source and commercial tools that aid in red team operations.
https://github.com/infosecn1nja/Red-Teaming-Toolkit

InfoSec Week 33, 2018

There is an OpenSSH user enumeration attack against all software versions on all operating systems.
It's a timing attack with proof of concept already published.
http://www.openwall.com/lists/oss-security/2018/08/15/5
https://bugfuzz.com/stuff/ssh-check-username.py

The so-called RedAlpha malware campaign targeting the Tibetan community is deploying a novel “ext4” Linux backdoor. The group is using infrastructure registered with Tsinghua1 University, China and is believed to be conducted by Chinese state-sponsored actors in support of China’s economic development goals.
https://www.recordedfuture.com/chinese-cyberespionage-operations/

The Australia’s Assistance and Access Bill, introduced this week, want to jail people for up to 10 years if they refuse to unlock their phones.
https://nakedsecurity.sophos.com/2018/08/16/australians-who-wont-unlock-their-phones-could-face-10-years-in-jail/

A new research paper named "Piping Botnet - Turning Green Technology into a Water Disaster" demonstrate that the researchers were able to manipulate commercial smart IoT systems used for regulating water and electricity resources.
https://arxiv.org/abs/1808.02131

The guy with his BMW car encountered the theft attempt, where something that looked like a vandalism was actually a really smart attack against the modern alarm system.
https://mrooding.me/a-dutch-first-ingenious-bmw-theft-attempt-5f7f49a96ec8

Cloudflare analyzed the changes and improvements of a new TLS 1.3 (RFC 8446) standard that was finally published last week.
https://blog.cloudflare.com/rfc-8446-aka-tls-1-3/

New Foreshadow attack demonstrates how speculative execution can be exploited for reading the contents of Intels' SGX-protected memory as well as extracting the machine’s private attestation key.
https://foreshadowattack.eu/

Practical dictionary attacks are possible against the main mode of IPsec IKEv1/v2 standard. Successful exploitation of a weak password requires only a single active man-in-the-middle attack.
https://web-in-security.blogspot.com/2018/08/practical-dictionary-attack-on-ipsec-ike.html

If you are interested how cryptographic key management is practically done, I have written a blog Commercial Cryptographic Key Management in 2018, where I am explaining a little bit about the hardware, people and processes behind it.
https://www.malgregator.com/key-management.html

Google published BrokenType, the font fuzzing toolset that helped find lots of vulnerabilities in the Windows kernel. It includes a font mutator, generator and loader.
https://github.com/google/BrokenType

InfoSec Week 31, 2018

Reddit got hacked. According to the investigation, it looks like hackers accessed employees 2FA protected accounts.
An attacker "compromised a few of Reddit's accounts with cloud and source code hosting providers by intercepting SMS 2FA verification codes".
https://www.reddit.com/r/announcements/comments/93qnm5/we_had_a_security_incident_heres_what_you_need_to/

A non-official French website keepass.fr using an URL similar to the popular password manager KeePass one lets you download a tampered version of the password manager with some adware in it.
https://twitter.com/JusticeRage/status/1021815597972291591

According to The Intercept_, Google is planning to launch a censored version of its search engine in China that will blacklist websites and search terms about human rights, democracy, religion, and peaceful protest.
One can only wonder whether it is some part of a broader strategy, how to spread channels of influence abroad.
https://theintercept.com/2018/08/01/google-china-search-engine-censorship/

There is a great blog published on a Trail of Bits about the recent invalid elliptic curve point attack against the Bluetooth implementations.
Give it a try if you are interested, it's really easy to read!
https://blog.trailofbits.com/2018/08/01/bluetooth-invalid-curve-points/amp/

A borough and a town in Alaska have been hit by a devastating ransomware attack, forcing employees to completely stop using computers and go back to typewriters and hand receipts.
https://mashable.com/2018/08/02/malware-alaska-town

BYOB (Build Your Own Botnet) is an open-source project that provides a framework for security researchers and developers to build and operate a basic botnet to deepen their understanding of the sophisticated malware that infects millions of devices every year and spawns modern botnets, in order to improve their ability to develop countermeasures against these threats.
https://github.com/colental/byob

FireEye wrote article about the internals of a FIN7 hacking group global operation.
https://www.fireeye.com/blog/threat-research/2018/08/fin7-pursuing-an-enigmatic-and-evasive-global-criminal-operation.html

WireGuard, next generation VPN software, is finally submitted for the Linux kernel inclusion. Linus Torvalds commented the pull request:
"I've skimmed it, and compared to the horrors that are OpenVPN and IPSec, it's a work of art."
https://marc.info/?l=linux-netdev&m=153306429108040&w=2
http://lists.openwall.net/netdev/2018/08/02/124

Malhunt: automated malware search in memory dumps using volatility and Yara rules.
https://github.com/andreafortuna/malhunt

InfoSec Week 30, 2018

Researchers from the Palo Alto Networks analyzed new Mirai and Gafgyt IoT/Linux botnet campaigns. The samples used more than 11 exploits for spreading, exploiting D-Link, Dasan GPON routers.
https://researchcenter.paloaltonetworks.com/2018/07/unit42-finds-new-mirai-gafgyt-iotlinux-botnet-campaigns/

Brian Krebs published a blog post about the current status of the Universal 2nd Factor (U2F) support. Google practically eliminated employee phishing by introducing mandatory usage of the physical security keys.
https://krebsonsecurity.com/2018/07/google-security-keys-neutered-employee-phishing/

There is a new module for the CHIPSEC Security Assessment Framework to check CPU USB debug features and host Direct Connection Interface (DCI), which can be used to modify system firmware with physical access and introduce "Evil Maid" firmware attacks.
https://blog.eclypsium.com/2018/07/23/evil-mai%EF%BB%BFd-firmware-attacks-using-usb-debug/

Chinese police arrested malware developers for hacking millions of computers to steal $2 million in cryptocurrencies.
https://www.ccn.com/chinese-police-arrest-malware-developers-who-hacked-2-million-in-crypto/

Paper on a new Spectre variant called SpectreRSB was published with the name "Spectre Returns! Speculation Attacks using the Return Stack Buffer".
According to a paper „none of the known defenses including Retpoline and Intel's microcode patches stop all SpectreRSB attacks.“
https://arxiv.org/abs/1807.07940

The source code of an Exobot Android Banking Trojan has been leaked online back in May has rapidly spread in the malware community.
https://www.bleepingcomputer.com/news/security/source-code-for-exobot-android-banking-trojan-leaked-online/

Because of insufficient validation of parameters in many Bluetooth implementations, attackers can inject invalid elliptic curve parameters which aren’t checked by many implementations in an invalid public key making session keys vulnerable.
https://www.kb.cert.org/vuls/id/304725

The Cisco Talos security team found multiple vulnerabilities, including remote code execution vulnerability in the Sony IPELA E series network camera. https://blog.talosintelligence.com/2018/07/sony-ipela-vulnerability-spotlight-multiple.html

NSA declassified papers from John Tiltman, one of Britain’s top cryptanalysts during the Second World War, which reveal how pre-world war 2 Brits analyzed and decrypted Russian cryptography.
https://www.theregister.co.uk/2018/07/19/russia_one_time_pads_error_british/

InfoSec Week 29, 2018

The academics have mounted a successful GPS spoofing attack against road navigation systems that can trick humans into driving to incorrect locations. The novel part is that they are using real map data to generate plausible malicious instructions.
https://www.bleepingcomputer.com/news/security/researchers-mount-successful-gps-spoofing-attack-against-road-navigation-systems/

Folks from Cloudflare, Mozilla, Fastly, and Apple during a hackaton implemented Encrypted Server Name Indication (SNI). There are implementations in BoringSSL, NSS and picotls.
https://twitter.com/grittygrease/status/1018566026320019457

Good insight on how credit card thieves use free-to-play apps to steal and launder money from the credit cards.
https://kromtech.com/blog/security-center/digital-laundry

Chromium recently introduced Cross-Origin Read Blocking (CORB) that helps mitigate the threat of side-channel attacks (including Spectre).
https://www.chromium.org/Home/chromium-security/corb-for-developers

For anybody interested in reverse engineering, nice write up about the Smoke Loader malware bot unpacking mechanism and communication with the C&C.
https://www.cert.pl/en/news/single/dissecting-smoke-loader/

A research on how to bypass memory scanners using Cobalt Strike’s beacon payload and the gargoyle memory scanning evasion technique.
https://labs.mwrinfosecurity.com/blog/experimenting-bypassing-memory-scanners-with-cobalt-strike-and-gargoyle/

Eset researchers analyzed ongoing espionage campaign against the Ukrainian government institutions.
https://www.welivesecurity.com/wp-content/uploads/2018/07/ESET_Quasar_Sobaken_Vermin.pdf

The intercept summarized what the public has learned about Russian and U.S. spycraft from the Special Counsel Robert Mueller’s indictment of hackers.
https://theintercept.com/2018/07/18/mueller-indictment-russian-hackers/

Security researchers have uncovered a highly targeted mobile malware campaign that has been operating since August 2015 and found spying on 13 selected iPhones in India.
https://blog.talosintelligence.com/2018/07/Mobile-Malware-Campaign-uses-Malicious-MDM.html

There is an exploit for Ubuntu Linux (up to 4.17.4) where other users coredumps can be read via setgid directory and killpriv bypass.
https://www.exploit-db.com/exploits/45033/

InfoSec Week 28, 2018

Hackers have poisoned the Arch Linux PDF reader package named “acroread” that was found in a user-provided Arch User Repository (AUR). They have put downloader malware inside.
https://www.bleepingcomputer.com/news/security/malware-found-in-arch-linux-aur-package-repository/

Hackers took over the maintainer account of the eslint-scope and eslint-config-eslint npm packages and published malicious versions which were downloading some juicy scripts from the pastebin.com. https://eslint.org/blog/2018/07/postmortem-for-malicious-package-publishes

Backend of the TimeHop iOS application was compromised, personal records of the 21 million customers leaked.
https://www.timehop.com/security/technical

Nice journalism about how few researchers found the names and addresses of soldiers and secret agents using Strava fitness application when the company published tracking maps on the internet.
https://decorrespondent.nl/8481/heres-how-we-found-the-names-and-addresses-of-soldiers-and-secret-agents-using-a-simple-fitness-app

Lexington Insurance Company and Beazley Insurance Company are suing Trustwave over a 2009 breach. Trustwave supposedly failed to detect malware that caused a breach.
This will be huge precedent in the whole industry.
https://www.bleepingcomputer.com/news/security/security-firm-sued-for-failing-to-detect-malware-that-caused-a-2009-breach/

One email to a North American Network Operators mailing list led to a concerted effort to kick a notorious BGP hijacking factory off the Internet.
https://blog.apnic.net/2018/07/12/shutting-down-the-bgp-hijack-factory/

It looks like that the Carbanak banking malware source code was leaked.
https://malware-research.org/carbanak-source-code-leaked/

Researchers found spying malware signed using digital certificates stolen from D-Link and other Taiwanese tech-companies.
https://thehackernews.com/2018/07/digital-certificate-malware.html

InfoSec Week 27, 2018

Samsung Galaxy S9 and S9+ devices, maybe others, are texting camera photos to random contacts through the Samsung Messages app without user permission.
https://www.theverge.com/circuitbreaker/2018/7/2/17528076/samsung-phones-text-rcs-update-messages

Gentoo Linux distribution GitHub repository was compromised. Attacker removed out all the maintainers, who realized the intrusion only 10 minutes after he gained access. He add rm -rf /* to build scripts, changed README and some minor things.
https://wiki.gentoo.org/wiki/Github/2018-06-28

Since January 2017, Stylish browser extension has been augmented with spyware that records every single website that its 2 million other users visit, then sends complete browsing activity back to its servers, together with a unique identifier.
https://robertheaton.com/2018/07/02/stylish-browser-extension-steals-your-internet-history/

Digicert Withdraws from the CA Security Council (CASC), because they "feel that CASC is not sufficiently transparent and does not represent the diversity of the modern Certificate Authority (CA) industry. Improving the ecosystem requires broad participation from all interested stakeholders, and many are being excluded unnecessarily."
Great step Digicert!
https://www.digicert.com/blog/notice-of-withdrawal-from-the-ca-security-council/

CryptoCurrency Clipboard Hijacker malware discovered by Bleeping Computer monitors for more than 2.3 million Bitcoin addresses, then replace them in memory, with the attacker address.
https://www.bleepingcomputer.com/news/security/clipboard-hijacker-malware-monitors-23-million-bitcoin-addresses/

Local root jailbreak, authorization bypass & privilege escalation vulnerabilities in all ADB broadband routers, gateways and modems. The patch is already available.
https://www.sec-consult.com/en/blog/advisories/local-root-jailbreak-via-network-file-sharing-flaw-in-all-adb-broadband-gateways-routers/

A Microsoft Security division published an analysis of the malware sample which exploited the Adobe Reader software and the Windows operating system using two zero-day exploits in a single PDF file.
https://cloudblogs.microsoft.com/microsoftsecure/2018/07/02/taking-apart-a-double-zero-day-sample-discovered-in-joint-hunt-with-eset/

Blog about why it is not helpful to use the Canvas Defender extension, a browser canvas fingerprinting countermeasure.
https://antoinevastel.com/tracking/2018/07/01/eval-canvasdef.html

Blog about the cryptographic primitives used by the North Korean Red Star operating system. The OS is mostly uses AES-256 Rijndael with dynamic S-Box modifications, but the design is evolving and the latest version of the algorithm has more differences.
https://blog.kryptoslogic.com/crypto/2018/07/03/pyongyang.html

Interesting technique how to bypass web-application firewalls by abusing SSL/TLS. An attacker can use an unsupported SSL cipher to initialize the connection to the webserver which supports that cipher, but the WAF would not be able to identify the attack because it can't view the data.
https://0x09al.github.io/waf/bypass/ssl/2018/07/02/web-application-firewall-bypass.html

Good introduction to the Linux ELF file format with some practical examples how sections look like, how to shrink the size during compilation and more.
https://0x00sec.org/t/dissecting-and-exploiting-elf-files/7267

InfoSec Week 25, 2018

Marcus Brinkmann demonstrated how some configuration options in the GnuPG allow remote attackers to spoof arbitrary signature. He used the embedded “filename” parameter in OpenPGP literal data packets, together with the verbose option set in their gpg.conf file.
https://neopg.io/blog/gpg-signature-spoof/

Tapplock Smart Lock has critical bugs making it a trivial protection. They are using the AES key derived from the MAC address, so anyone with a Bluetooth enabled smartphone can pick up the key upon getting to a smart lock Bluetooth range.
https://latesthackingnews.com/2018/06/16/tapplock-smart-lock-is-having-a-bad-time-two-bugs-reported-in-one-week/

Crooks are injecting credit card stealing backdoor to the config files of a hacked Magento e-commerce platforms. They can reinfect the rest of code base over and over again with the config load.
https://thehackernews.com/2018/06/magento-security-hacking.html

Updated Satori botnet began to perform network wide scan looking for exploitable XiongMai uc-httpd 1.0.0 devices (CVE-2018-10088).
https://blog.netlab.360.com/botnets-never-die-satori-refuses-to-fade-away-en/

Baby Monitors in the USA were hacked via obscure Chinese IoT cloud. The woman from the Facebook post claims that someone controlled the camera remotely and spied on her, possibly listened in to conversations.
https://www.sec-consult.com/en/blog/2018/06/true-story-the-case-of-a-hacked-baby-monitor-gwelltimes-p2p-cloud/

OpenBSD disables Intel's hyper-threading due to possible exploitable spectre-class bugs in the architecture.
https://www.mail-archive.com/source-changes@openbsd.org/msg99141.html

Linux is getting support for in-kernel hibernation encryption. Encrypts disk-image memory, thereby increasing the general security of full-disk encryption on Linux and reducing the attack surface.
http://lkml.iu.edu/hypermail/linux/kernel/1806.2/03567.html

OTSECA - (ot)her (sec)urity (a)wareness is an open source security auditing tool to search and dump system configuration. It allows you to generate reports in HTML or RAW-HTML formats.
https://github.com/trimstray/otseca

InfoSec Week 21, 2018

500,000 routers in more than 50 countries are infected with the malware targeting routers. Primarily home devices like Linksys, MikroTik, NETGEAR and TP-Link.
Cisco's Talos Security attributed malware to the future Russian cyber operations against the Ukraine. The US FBI agents seize control of the botnet.
https://blog.talosintelligence.com/2018/05/VPNFilter.html
https://www.thedailybeast.com/exclusive-fbi-seizes-control-of-russian-botnet

The Internet Archive's Wayback Machine is deleting evidence on the malware sellers. They have removed from their archive a webpage of a Thailand-based firm FlexiSpy, which offers desktop and mobile malware.
https://motherboard.vice.com/en_us/article/nekzzq/wayback-machine-deleting-evidence-flexispy

According to the McAfee team, North Korean threat actor Sun Team is targeting defectors using the malicious Android applications on Google Play.
https://securingtomorrow.mcafee.com/mcafee-labs/malware-on-google-play-targets-north-korean-defectors/

Don't use sha256crypt & sha512crypt primitives as shipped with GNU/Linux, they're leaking information about the password via time duration of a hashing operation.
Not critical vulnerability, but good to know.
https://pthree.org/2018/05/23/do-not-use-sha256crypt-sha512crypt-theyre-dangerous/

The Intercept published an interesting article about the Japanese signals intelligence agency, based on Snowden's leaks.
https://theintercept.com/2018/05/19/japan-dfs-surveillance-agency/

The US FBI repeatedly overstated encryption threat figures to Congress and the public.
https://www.washingtonpost.com/world/national-security/fbi-repeatedly-overstated-encryption-threat-figures-to-congress-public/2018/05/22/5b68ae90-5dce-11e8-a4a4-c070ef53f315_story.html

The US internet provider Comcast was leaking the usernames and passwords of customers’ wireless routers to anyone with the valid subscriber’s account number and street address number.
https://techcrunch.com/2018/05/21/comcast-is-leaking-the-names-and-passwords-of-customers-wireless-routers/

Amazon is pitching their facial recognition technology to law enforcement agencies, saying the program could aid criminal investigations by recognizing suspects in photos and videos.
https://www.nytimes.com/2018/05/22/technology/amazon-facial-recognition.html

Great blog about the SMS binary payloads and how SMS is weakening mobile security for years.
https://www.contextis.com/blog/binary-sms-the-old-backdoor-to-your-new-thing

Researchers from the Eclypsium found a new variation of the Spectre attack that can allow attackers to recover data stored inside CPU System Management Mode. They have even published Proof-of-concept.
https://blog.eclypsium.com/2018/05/17/system-management-mode-speculative-execution-attacks/


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