SB2007091703 - Improper input validation in Linux kernel
Published: September 17, 2007
Security Bulletin ID
SB2007091703
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper input validation (CVE-ID: CVE-2007-3731)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function.
Remediation
Install update from vendor's website.
References
- http://bugzilla.kernel.org/show_bug.cgi?id=8765
- https://bugzilla.redhat.com/show_bug.cgi?id=248324
- http://www.debian.org/security/2007/dsa-1378
- http://www.redhat.com/support/errata/RHSA-2007-0940.html
- http://www.ubuntu.com/usn/usn-518-1
- http://www.securityfocus.com/bid/25801
- http://secunia.com/advisories/26935
- http://secunia.com/advisories/26955
- http://secunia.com/advisories/26978
- http://secunia.com/advisories/27322
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094
- https://issues.rpath.com/browse/RPL-2304
- http://secunia.com/advisories/29159
- http://osvdb.org/37286
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394
- http://www.securityfocus.com/archive/1/488972/100/0/threaded
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f