Tag MacOS

InfoSec Week 1, 2018

Daniel Shapira from Twistlock wrote a blog about exploiting a Linux kernel vulnerability in the waitid() syscall (CVE-2017-5123) in order to modify the Linux capabilities of a Docker container, gain privileges and escape the container jail.

There is a critical hardware bug in the Intel chips, which enables a user level process to access kernel address space, thus read other processes memory. Cloud providers and OS makers are preparing software patches, but the performance penalty could be significant. According to the Wired:
"[researchers] confirmed that when Intel processors perform that speculative execution, they don't fully segregate processes that are meant to be low-privilege and untrusted from the highest-privilege memory in the computer's kernel. That means a hacker can trick the processor into allowing unprivileged code to peek into the kernel's memory with speculative execution."

The guy dumped PlayStation 4 kernel by leaking arbitrary memory into accessible crashdumps.

ACM published article about more than 2 decades old ransomware experiments with the name "Cryptovirology: The Birth, Neglect, and Explosion of Ransomware".

Nice write up about exploit development for the arbitrary command execution on a BMC Server Automation remote agent software.

MacOS-only 0day vulnerability published on a last day of 2017. It is an IOHIDSystem kernel vulnerability that can be exploited by any unprivileged user.

Edward Snowden’s open source Haven application uses smartphone sensors to detect physical tampering.

PiKarma detects wireless network attacks performed by KARMA module (fake AP). Starts deauthentication attack (for fake access points).

InfoSec Week 47, 2017

According to the annual State of Open Source Security report, 77% of 433000 analyzed sites use at least one front-end JavaScript library with a known security vulnerability.

The AWS team published blog about the recent improvements to the secure random number generation in Linux 4.14, OpenSSL and libc.

Really good introduction to the anonymous communication network design and mix nets in general, published by Least Authority.

Those guys reverse-engineered the Furby Connect DLC file format and are able to remotely upload their own logos, songs to the device over Bluetooth.

There is a critical vulnerability in the MacOS High Sierra, anyone can login as root with empty password after clicking on login button several times. For now, it could be mitigated by just changing the root password.

Very good investigative journalism about the mysterious NSA contractor which could provided top secret documents to the Shadow Brokers.

Uber paid hackers $100k to delete stolen data on 57 million people and shut up. They have even tried to fake it as an bug bounty payment.

Someone published remote code execution exploit for the Exim Mail server (CVE-2017-16944) on GitHub. Shodan.io shows more than 400k servers with the vulnerable CHUNKING feature.

InfoSec Week 33, 2017

Danish conglomerate Maersk expects to lose between $200-300m due to Petya ransomware infection, according to their latest quarterly results.

A Windows Object Linking Embedding (OLE) interface vulnerability in Microsoft PowerPoint in being exploited in order to install malware.

Interesting blog about the exploitation of a Foxit Reader.
"A tale about Foxit Reader - Safe Reading mode and other vulnerabilities"

Engineer decrypts Apple's Secure Enclave Processor (SEP) firmware.

Facebook awards $100,000 to 2017 Internet Defense Prize winning paper "Detecting Credential Spearphishing Attacks in Enterprise Settings". Very useful research for urgent topic.
https://www.usenix.org/conference/usenixsecurity17/technical-sessions/presentation/ho https://research.fb.com/facebook-awards-100000-to-2017-internet-defense-prize-winners/

Cryptographic library Libsodium has been audited by Matthew Green of Cryptography Engineering.

New research on integer factorization suggests that "build a massive decryption tool of IPsec traffic protected by the Oakley group~1 (a 768-bit discrete logarithm problem), was feasible in a reasonable time using technologies available before the year 2000." https://eprint.iacr.org/2017/758

EggShell is an iOS and macOS post exploitation surveillance pentest tool written in Python.

InfoSec Week 6, 2017

A new malware called MacDownloader, attributed to the Iran, targeting macOS systems spotted in the wild. Spreading as an Adobe Flash installer or a Bitdefender Adware Removal Tool, depend on social engineering. After installation, it attempts to exfiltrate OS X keychain database as well as the other system information.

Google Project Zero investigated inner-working of Real-Time Kernel Protection (RKP) used by Samsung KNOX using a fully updated Galaxy S7 Edge. They have presented multiple vulnerabilities which allow them to subvert each of RKP’s security mechanisms.

A former National Security Agency contractor Harold T. Martin III is accused of carrying out theft of 50 terabytes of classified information.
"The indictment against Harold T. Martin III is expected to contain charges of violating the Espionage Act by "willfully" retaining information that relates to the national defense, including classified data such as NSA hacking tools and operational plans against "a known enemy" of the United States, according to individuals familiar with the case."

Google Chrome 56 lets websites connect to Bluetooth devices and harvest information from them through the browser. Summary of the Web Bluetooth API security model written by Chrome team's Jeffrey Yasskin can be found on Medium.

Doctor Web detects new Mirai trojan fork able to use Windows machines when scanning the internet for the other targets.

CRYSIS ransomware family is targeting a US healthcare sector via remote desktop (RDP) brute force attacks.

A new ransomware known as "Serpent" is targeting Danish recipients using emails linking to malicious Microsoft Office documents.

Multiple proponents of Mexico’s 2014 soda tax aimed at reducing consumption of sugary drinks in Mexico were targeted by spyware.
The malicious program is developed by an Israeli cyberarms dealer NSO Group.

Keybase introduced an end-to-end crypto app for secure interactive messaging which works with already established 3rd party accounts.
Interesting solution to the key exchange problem, other solutions usually use a Trust On First Use (TOFU). Just to note, only "exploding" messages have forward secrecy.

Wire’s encrypted messaging protocol got audited. Kudelski Security and X41 D-Sec found it to have "high security, thanks to state-of-the-art cryptographic protocols and algorithms, and software engineering practices mitigating the risk of software bugs."
https://research.kudelskisecurity.com/2017/02/09/wire-cryptography-audit-with-x41-d-sec/ https://medium.com/wire-news/wires-independent-security-review-61f37a1762a8

A great story about the Russian "research" company which reverse engineered older slot machines in order to predict the output. And they are cashing in on it...