CVE-2009-2692

Priority
Medium
Description
The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does
not initialize all function pointers for socket operations in proto_ops
structures, which allows local users to trigger a NULL pointer dereference
and gain privileges by using mmap to map page zero, placing arbitrary code
on this page, and then invoking an unavailable operation, as demonstrated
by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.
References
Bugs
Notes
 Ubuntu 8.04 and later have a default setting of 65536 in /proc/sys/vm/mmap_min_addr. When set, this issue is blocked. If your value is 0, please purge the "wine" and "dosemu" packages, and reset the value:
  sudo apt-get purge wine dosemu
  echo 65536 | sudo tee /proc/sys/vm/mmap_min_addr
 On Ubuntu 6.06, we recommend the work-around detailed in the linked bug.
Package
Upstream:released (2.6.31~rc6)
Patches:
Upstream:http://git.kernel.org/linus/e694958388c50148389b0e9b9e9e8945cf0f1b98
Package
Source: linux (LP Ubuntu Debian)
Upstream:released (2.6.31~rc6)
Patches:
Upstream:http://git.kernel.org/linus/e694958388c50148389b0e9b9e9e8945cf0f1b98
More Information

Updated: 2018-05-21 23:14:40 UTC (commit 14788)