National Cyber-Alert System
Vulnerability Summary for CVE-2009-2847
Original release date:08/18/2009
Last revised:09/19/2009
Source:
US-CERT/NIST
Overview
The do_sigaltstack function in kernel/signal.c in Linux kernel 2.4 through 2.4.37 and 2.6 before 2.6.31-rc5, when running on 64-bit systems, does not clear certain padding bytes from a structure, which allows local users to obtain sensitive information from the kernel stack via the sigaltstack function.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.9
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows unauthorized disclosure of information
Official Statement from Red Hat (09/15/2009)
This issue has been rated as having moderate security impact. It was addressed in Red Hat Enterprise Linux 4, 5 and Red Hat Enterprise MRG:
http://rhn.redhat.com/cve/CVE-2009-2847.html
This issue is not planned to be fixed in Red Hat Enterprise Linux 3, due to this product being in Production 3 of its maintenance life-cycle, where only qualified security errata of important or critical impact are addressed. For further information about Errata Support Policy, visit: http://www.redhat.com/security/updates/errata/
References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=515392
Type: Patch Information
External Source: MLIST
Name: [oss-security] 20090805 Re: CVE request - kernel: information leak in sigaltstack
Type: Patch Information
External Source: MLIST
Name: [oss-security] 20090804 CVE request - kernel: information leak in sigaltstack
Type: Patch Information
External Source: FEDORA
Name: FEDORA-2009-9044
External Source: REDHAT
Name: RHSA-2009:1438
External Source: MLIST
Name: [oss-security] 20090826 Re: CVE request - kernel: information leak in sigaltstack
External Source: MILW0RM
Name: 9352
External Source: SECUNIA
Name: 36759
External Source: SECUNIA
Name: 36501
External Source: SECUNIA
Name: 36136
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=0083fc2c50e6c5127c2802ad323adf8143ab7856
