CVE-2009-0835

Published: 6 March 2009

The __secure_computing function in kernel/seccomp.c in the seccomp subsystem in the Linux kernel 2.6.28.7 and earlier on the x86_64 platform, when CONFIG_SECCOMP is enabled, does not properly handle (1) a 32-bit process making a 64-bit syscall or (2) a 64-bit process making a 32-bit syscall, which allows local users to bypass intended access restrictions via crafted syscalls that are misinterpreted as (a) stat or (b) chmod, a related issue to CVE-2009-0342 and CVE-2009-0343.

From the Ubuntu Security Team

The syscall interface did not correctly validate parameters when crossing the 64-bit/32-bit boundary. A local attacker could bypass certain syscall restricts via crafted syscalls.

Status

References

• https://ubuntu.com/security/notices/USN-751-1
• https://ubuntu.com/security/notices/USN-752-1
• https://www.cve.org/CVERecord?id=CVE-2009-0835
• NVD
• Launchpad
• Debian