National Cyber-Alert System
Vulnerability Summary for CVE-2009-1338
Original release date:04/22/2009
Last revised:06/09/2009
Source:
US-CERT/NIST
Overview
The kill_something_info function in kernel/signal.c in the Linux kernel before 2.6.28 does not consider PID namespaces when processing signals directed to PID -1, which allows local users to bypass the intended namespace isolation, and send arbitrary signals to all processes in all namespaces, via a kill command.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.4
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Provides unauthorized access, Allows partial confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service
- Official Statement from Red Hat (04/23/2009)
-
Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-1338
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and 5. Future kernel updates in Red Hat Enterprise MRG will address this flaw.
References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=496031
Type: Patch Information
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28
Type: Advisory; Patch Information
External Source: MLIST
Name: [linux-kernel] 20080723 Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace
Type: Patch Information
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d25141a818383b3c3b09f065698c544a7a0ec6e7
Type: Advisory; Patch Information
External Source: XF
Name: kernel-killsomethinginfo-security-bypass(50386)
External Source: BUGTRAQ
Name: 20090516 rPSA-2009-0084-1 kernel
External Source: REDHAT
Name: RHSA-2009:1081
External Source: MLIST
Name: [oss-security] 20090421 Re: CVE request: kernel: 'kill sig -1' must only apply to caller's PID namespace
External Source: MLIST
Name: [oss-security] 20090417 Re: CVE request: kernel: 'kill sig -1' must only apply to caller's PID namespace
External Source: MLIST
Name: [oss-security] 20090416 CVE request: kernel: 'kill sig -1' must only apply to caller's PID namespace
External Source: DEBIAN
Name: DSA-1800
External Source: DEBIAN
Name: DSA-1787
External Source: CONFIRM
Name: http://wiki.rpath.com/Advisories:rPSA-2009-0084
External Source: SECUNIA
Name: 35121
External Source: SECUNIA
Name: 35120
External Source: SECUNIA
Name: 34981
