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Linux Reverse Engineering Hacker Challenge

The first round results of the Linux Reverse Engineering Hacker Challenge are out! http://www.hackerchallenge.org It was expected that an intermediate hacker with Linux experience should be able to defeat the protection(s) in less than 10 hours. Participants may earn up to $4100 USD. A total of 93 individuals registered to participate in the first Hacker […]

Topic: Linux Hacking, Secure Coding

Linux Kernel 2.6.x PRCTL Core Dump Handling – Local r00t Exploit ( BID 18874 / CVE-2006-2451 )

A working version of the exploit used to escalate privileges to root in the recent Debian breakin, ah another root kernel exploit. It’s to do with the way the kernel handles file permissions (or lack of) on core dumps. Linux kernel is prone to a local privilege-escalation vulnerability. A local attacker may gain elevated privileges […]

Topic: Exploits/Vulnerabilities, Linux Hacking

Debian Development Machine ‘gluck’ Hacked!

Ah, I wonder what happened? I’ve always been a great fan of Debian, all the way back into the early days of woody and backporting apt packages. What a name too, gluck to me usually means g’luck or good luck ;) Early this morning we discovered that someone had managed to compromise gluck.debian.org. We’ve taken […]

Topic: Exploits/Vulnerabilities, Linux Hacking

MORE Sendmail Problems – Signal Handling Vulnerability

OH MY GOD, NOT ANOTHER SENDMAIL FLAW? What’s that? Yah number 1001010102121. Recently, Mark Dowd of ISS discovered a signal handling vulnerability in Sendmail. We don’t see major bugs in software that’s as popular as Sendmail very often (at least, in the Unix world anyways), and that’s probably a good thing. According to sendmail.com, Sendmail […]

Topic: Exploits/Vulnerabilities, Linux Hacking

Homeland Security Uncovers Critical Flaw in X11

An open-source security audit program funded by the U.S. Department of Homeland Security has flagged a critical vulnerability in the X Window System (X11) which is used in Unix and Linux systems. A missing parentheses in a bit of code is to blame. The error can grant a user root access, and was discovered using […]

Topic: Exploits/Vulnerabilities, Linux Hacking

Some Good Tips to Secure Linux

I came across this while browsing, has some pretty solid stuff, goes deeper than most basic Linux security guides. It has some good sections like this on protection against fork bombs: Fork bombs are programs that keep creating child processes until system resources are all used, they actually aren’t remote exploits because they require a […]

Topic: Linux Hacking