CVE-2010-4258
MEDIUM severity · CVSS 6.2 · Improper privilege management
6.2CVSS MEDIUM
Summary
The do_exit function in kernel/exit.c in the Linux kernel before 2.6.36.2 does not properly handle a KERNEL_DS get_fs value, which allows local users to bypass intended access_ok restrictions, overwrite arbitrary kernel memory locations, and gain privileges by leveraging a (1) BUG, (2) NULL pointer dereference, or (3) page fault, as demonstrated by vectors involving the clear_child_tid feature and the splice system call.
Impact & exploitability
Attack vectorLocal
Attack complexityHigh
Privileges required—
User interaction—
Confidentiality impact—
Integrity impact—
Availability impact—
Exploit probability (EPSS)3%
AV:L/AC:H/Au:N/C:C/I:C/A:C
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://archives.neohapsis.com/archives/fulldisclosure/2010-12/0086.html
- http://blog.nelhage.com/2010/12/cve-2010-4258-from-dos-to-privesc/Advisory
- http://code.google.com/p/chromium-os/issues/detail?id=10234Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=33dd94ae1ccbfb7bf0fb6c692bc3d1c4269e6177
- http://googlechromereleases.blogspot.com/2011/01/chrome-os-beta-channel-update.htmlAdvisory
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052513.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.htmlAdvisory