CVE-2006-5173
First published: Tue Oct 17 2006(Updated: )
Linux kernel does not properly save or restore EFLAGS during a context switch, or reset the flags when creating new threads, which allows local users to cause a denial of service (process crash), as demonstrated using a process that sets the Alignment Check flag (EFLAGS 0x40000), which triggers a SIGBUS in other processes that have an unaligned access.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | >=2.4.0<=2.6.19 | |
| Ubuntu Linux | =6.10 | |
| Ubuntu Linux | =5.10 | |
| Ubuntu Linux | =6.06 | |
| Linux Kernel | >=2.4.0<=2.6.19 | |
| Ubuntu | =5.10 | |
| Ubuntu | =6.06 | |
| Ubuntu | =6.10 | |
| >=2.4.0<=2.6.19 | ||
| =5.10 | ||
| =6.06 | ||
| =6.10 |
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Reference Links
- http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=47a5c6fa0e204a2b63309c648bb2fde36836c826
- http://www.ubuntu.com/usn/usn-395-1
- http://secunia.com/advisories/23361
- http://secunia.com/advisories/23384
- http://www.novell.com/linux/security/advisories/2006_79_kernel.html
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:002
- http://secunia.com/advisories/23593
- http://www.securityfocus.com/archive/1/471457
- http://secunia.com/advisories/25691
- http://secunia.com/advisories/23474
- http://www.securityfocus.com/bid/21851
- http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=47a5c6fa0e204a2b63309c648bb2fde36836c826
Frequently Asked Questions
What is the severity of CVE-2006-5173?
CVE-2006-5173 has a severity rating of medium, as it can lead to a denial of service through process crashes.
How do I fix CVE-2006-5173?
To fix CVE-2006-5173, upgrade your Linux kernel to a version that is newer than 2.6.19.
Which Linux distributions are affected by CVE-2006-5173?
CVE-2006-5173 affects several distributions including older versions of Ubuntu such as 5.10, 6.06, and 6.10.
What types of attacks exploit CVE-2006-5173?
CVE-2006-5173 can be exploited by local users to crash processes by manipulating the EFLAGS register.
Can CVE-2006-5173 be exploited remotely?
CVE-2006-5173 cannot be exploited remotely; it requires local access to the affected system.
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