CVE-2010-3301
Publication date 15 September 2010
Last updated 24 July 2024
Ubuntu priority
The IA32 system call emulation functionality in arch/x86/ia32/ia32entry.S in the Linux kernel before 2.6.36-rc4-git2 on the x86_64 platform does not zero extend the %eax register after the 32-bit entry path to ptrace is used, which allows local users to gain privileges by triggering an out-of-bounds access to the system call table using the %rax register. NOTE: this vulnerability exists because of a CVE-2007-4573 regression.
From the Ubuntu Security Team
Ben Hawkes discovered that the Linux kernel did not correctly filter registers on 64bit kernels when performing 32bit system calls. On a 64bit system, a local attacker could manipulate 32bit system calls to gain root privileges.
Status
Package | Ubuntu Release | Status |
---|---|---|
linux | ||
linux-ec2 | ||
linux-fsl-imx51 | ||
linux-lts-backport-maverick | ||
linux-source-2.6.15 | ||
Notes
kees
only exploitable on x86_64, regression of CVE-2007-4573 was originally fixed in 2.6.22, but regressed after this commit: http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.35.y.git;a=commitdiff;h=d4d67150165df8bf1cc05e532f6efca96f907cab
smb
Which was 2.6.27 upstream, the original fix was in 2.6.23
kees
it was later discovered that the Xen kernels (linux-ec2) needed an additional patch.
Patch details
References
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