medium
4.9
CWE
Advisory Published
CVE Published
Updated

CVE-2009-2847

First published: Fri Jul 31 2009(Updated: )

Description of problem: do_sigaltstack: avoid copying 'stack_t' as a structure to user space Ulrich Drepper correctly points out that there is generally padding in the structure on 64-bit hosts, and that copying the structure from kernel to user space can leak information from the kernel stack in those padding bytes. Avoid the whole issue by just copying the three members one by one instead, which also means that the function also can avoid the need for a stack frame. This also happens to match how we copy the new structure from user space, so it all even makes sense. Upstream commit: <a href="http://git.kernel.org/linus/0083fc2c50e6c5127c2802ad323adf8143ab7856">http://git.kernel.org/linus/0083fc2c50e6c5127c2802ad323adf8143ab7856</a>

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:2.6.24.7-132.el5
0:2.6.24.7-132.el5
redhat/kernel<0:2.6.18-164.el5
0:2.6.18-164.el5
redhat/kernel<0:2.6.18-128.8.1.el5
0:2.6.18-128.8.1.el5
Linux kernel=2.6.24.7
Linux kernel=2.6.25.15
Linux Linux kernel<=2.6.16.31
Linux Linux kernel=2.6
Linux Linux kernel=2.6.0
Linux Linux kernel=2.6.1
Linux Linux kernel=2.6.10
Linux Linux kernel=2.6.11
Linux Linux kernel=2.6.11.1
Linux Linux kernel=2.6.11.2
Linux Linux kernel=2.6.11.3
Linux Linux kernel=2.6.11.4
Linux Linux kernel=2.6.11.5
Linux Linux kernel=2.6.11.6
Linux Linux kernel=2.6.11.7
Linux Linux kernel=2.6.11.8
Linux Linux kernel=2.6.11.9
Linux Linux kernel=2.6.11.10
Linux Linux kernel=2.6.11.11
Linux Linux kernel=2.6.11.12
Linux Linux kernel=2.6.12
Linux Linux kernel=2.6.12.1
Linux Linux kernel=2.6.12.2
Linux Linux kernel=2.6.12.3
Linux Linux kernel=2.6.12.4
Linux Linux kernel=2.6.12.5
Linux Linux kernel=2.6.12.6
Linux Linux kernel=2.6.13
Linux Linux kernel=2.6.13.1
Linux Linux kernel=2.6.13.2
Linux Linux kernel=2.6.13.3
Linux Linux kernel=2.6.13.4
Linux Linux kernel=2.6.13.5
Linux Linux kernel=2.6.14
Linux Linux kernel=2.6.14.1
Linux Linux kernel=2.6.14.2
Linux Linux kernel=2.6.14.3
Linux Linux kernel=2.6.14.4
Linux Linux kernel=2.6.14.5
Linux Linux kernel=2.6.14.6
Linux Linux kernel=2.6.14.7
Linux Linux kernel=2.6.15
Linux Linux kernel=2.6.15.1
Linux Linux kernel=2.6.15.2
Linux Linux kernel=2.6.15.3
Linux Linux kernel=2.6.15.4
Linux Linux kernel=2.6.15.5
Linux Linux kernel=2.6.15.6
Linux Linux kernel=2.6.15.7
Linux Linux kernel=2.6.16
Linux Linux kernel=2.6.16.1
Linux Linux kernel=2.6.16.2
Linux Linux kernel=2.6.16.3
Linux Linux kernel=2.6.16.10
Linux Linux kernel=2.6.16.11
Linux Linux kernel=2.6.16.12
Linux Linux kernel=2.6.16.13
Linux Linux kernel=2.6.16.14
Linux Linux kernel=2.6.16.15
Linux Linux kernel=2.6.16.16
Linux Linux kernel=2.6.16.17
Linux Linux kernel=2.6.16.18
Linux Linux kernel=2.6.16.19
Linux Linux kernel=2.6.16.20
Linux Linux kernel=2.6.16.21
Linux Linux kernel=2.6.16.22
Linux Linux kernel=2.6.16.23
Linux Linux kernel=2.6.16.24
Linux Linux kernel=2.6.16.25
Linux Linux kernel=2.6.16.26
Linux Linux kernel=2.6.16.27
Linux Linux kernel=2.6.16.28
Linux Linux kernel=2.6.16.29
Linux Linux kernel=2.6.16.30
Linux Linux kernel=2.6.16.31
Linux Linux kernel=2.6.16.31--rc1
Linux Linux kernel=2.6.16.31--rc2
Linux Linux kernel=2.6.16.31--rc3
Linux Linux kernel=2.6.16.31--rc4
Linux Linux

Remedy

http://www.openwall.com/lists/oss-security/2009/08/04/1

Remedy

http://www.openwall.com/lists/oss-security/2009/08/05/1

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=515392

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