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PublicDateAtUSN: 2010-09-15
Candidate: CVE-2010-3081
PublicDate: 2010-09-24
References:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3081
http://www.ubuntu.com/usn/usn-988-1
http://www.ubuntu.com/usn/usn-1074-1
http://www.ubuntu.com/usn/usn-1074-2
http://www.ubuntu.com/usn/usn-1119-1
Description:
The compat_alloc_user_space functions in include/asm/compat.h files in the
Linux kernel before 2.6.36-rc4-git2 on 64-bit platforms do not properly
allocate the userspace memory required for the 32-bit compatibility layer,
which allows local users to gain privileges by leveraging the ability of
the compat_mc_getsockopt function (aka the MCAST_MSFILTER getsockopt
support) to control a certain length value, related to a "stack pointer
underflow" issue, as exploited in the wild in September 2010.
Ubuntu-Description:
Ben Hawkes discovered that the Linux kernel did not correctly validate
memory ranges on 64bit kernels when allocating memory on behalf of 32bit
system calls. On a 64bit system, a local attacker could perform malicious
multicast getsockopt calls to gain root privileges.
Notes:
Bugs:
Priority: high
Discovered-by: Ben Hawkes
Assigned-to: smb
Patches_linux-source-2.6.15:
dapper: http://chinstrap.ubuntu.com/~smb/CVEs/CVE-2010-3081/patches/dapper/linux/0001-compat-Make-compat_alloc_user_space-incorporate-the-ac.txt
upstream_linux-source-2.6.15: released (2.6.36~rc5)
dapper_linux-source-2.6.15: released (2.6.15-55.88)
hardy_linux-source-2.6.15: DNE
jaunty_linux-source-2.6.15: DNE
karmic_linux-source-2.6.15: DNE
lucid_linux-source-2.6.15: DNE
maverick_linux-source-2.6.15: DNE
devel_linux-source-2.6.15: DNE
Patches_linux:
upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=c41d68a513c71e35a14f66d71782d27a79a81ea6
hardy: http://chinstrap.ubuntu.com/~smb/CVEs/CVE-2010-3081/patches/hardy/linux/0001-compat-Make-compat_alloc_user_space-incorporate-the-ac.txt
jaunty: http://chinstrap.ubuntu.com/~smb/CVEs/CVE-2010-3081/patches/jaunty/linux/0001-compat-Make-compat_alloc_user_space-incorporate-the-ac.txt
karmic: http://chinstrap.ubuntu.com/~smb/CVEs/CVE-2010-3081/patches/karmic/linux/0001-compat-Make-compat_alloc_user_space-incorporate-the-ac.txt
lucid: http://chinstrap.ubuntu.com/~smb/CVEs/CVE-2010-3081/patches/lucid/linux/0001-compat-Make-compat_alloc_user_space-incorporate-the-ac.txt
upstream_linux: released (2.6.36~rc5)
dapper_linux: DNE
hardy_linux: released (2.6.24-28.79)
jaunty_linux: released (2.6.28-19.65)
karmic_linux: released (2.6.31-22.65)
lucid_linux: released (2.6.32-24.43)
maverick_linux: released (2.6.35-22.32)
devel_linux: not-affected
Patches_linux-fsl-imx51:
upstream_linux-fsl-imx51: released (2.6.36~rc5)
dapper_linux-fsl-imx51: DNE
hardy_linux-fsl-imx51: DNE
karmic_linux-fsl-imx51: released (2.6.31-112.30)
lucid_linux-fsl-imx51: released (2.6.31-608.22)
maverick_linux-fsl-imx51: DNE
devel_linux-fsl-imx51: DNE
Patches_linux-ti-omap4:
upstream_linux-ti-omap4: released (2.6.36~rc5)
dapper_linux-ti-omap4: DNE
hardy_linux-ti-omap4: DNE
karmic_linux-ti-omap4: DNE
lucid_linux-ti-omap4: DNE
maverick_linux-ti-omap4: released (2.6.35-903.22)
devel_linux-ti-omap4: not-affected
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