National Cyber-Alert System
Vulnerability Summary for CVE-2009-2406
Original release date:07/31/2009
Last revised:08/12/2009
Source:
US-CERT/NIST
Overview
Stack-based buffer overflow in the parse_tag_11_packet function in fs/ecryptfs/keystore.c in the eCryptfs subsystem in the Linux kernel before 2.6.30.4 allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving a crafted eCryptfs file, related to not ensuring that the key signature length in a Tag 11 packet is compatible with the key signature buffer size.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
10.0
Exploitability Subscore:
3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable; Victim must voluntarily interact with attack mechanism
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type:Provides administrator access, Allows complete confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service
- Official Statement from Red Hat (08/18/2009)
-
The Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, and Red Hat Enterprise MRG did not include support for eCryptfs, and therefore are not affected by this issue.
Red Hat Enterprise Linux 5 was vulnerable to this issue and was addressed via: https://rhn.redhat.com/errata/RHSA-2009-1193.html
References to Advisories, Solutions, and Tools
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External Source: VUPEN
Name: ADV-2009-2041
Type: Advisory; Patch Information
External Source: BID
Name: 35851
Type: Patch Information
External Source: DEBIAN
Name: DSA-1845
Type: Patch Information
External Source: DEBIAN
Name: DSA-1844
Type: Patch Information
External Source: FEDORA
Name: FEDORA-2009-8144
External Source: FEDORA
Name: FEDORA-2009-8264
External Source: UBUNTU
Name: USN-807-1
External Source: SECTRACK
Name: 1022663
External Source: BUGTRAQ
Name: 20090728 [RISE-2009002] Linux eCryptfs parse_tag_11_packet Literal Data Buffer Overflow Vulnerability
External Source: REDHAT
Name: RHSA-2009:1193
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.4
Type: Advisory
External Source: SECUNIA
Name: 36131
External Source: SECUNIA
Name: 36116
External Source: SECUNIA
Name: 36054
Type: Advisory
External Source: SECUNIA
Name: 36051
Type: Advisory
External Source: SECUNIA
Name: 36045
Type: Advisory
External Source: SECUNIA
Name: 35985
Type: Advisory
External Source: MISC
Name: http://risesecurity.org/advisories/RISE-2009002.txt
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6352a29305373ae6196491e6d4669f301e26492e
