CVE-2009-0029

Published: 15 January 2009

The ABI in the Linux kernel 2.6.28 and earlier on s390, powerpc, sparc64, and mips 64-bit platforms requires that a 32-bit argument in a 64-bit register was properly sign extended when sent from a user-mode application, but cannot verify this, which allows local users to cause a denial of service (crash) or possibly gain privileges via a crafted system call.

From the Ubuntu Security Team

The 64-bit syscall interfaces did not correctly handle sign extension. A local attacker could make malicious syscalls, possibly gaining root privileges. The x86_64 architecture was not affected.

Status

References

• https://bugzilla.redhat.com/show_bug.cgi?id=479969
• http://marc.info/?l=linux-kernel&m=123155111608910&w=2
• https://ubuntu.com/security/notices/USN-752-1
• https://www.cve.org/CVERecord?id=CVE-2009-0029
• NVD
• Launchpad
• Debian