Buffer overflow in Linux kernel - CVE-2013-1772

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The log_prefix function in kernel/printk.c in the Linux kernel 3.x before 3.4.33 does not properly remove a prefix string from a syslog header, which allows local users to cause a denial of service (buffer overflow and system crash) by leveraging /dev/kmsg write access and triggering a call_console_drivers function call.

Affected software

How to mitigate CVE-2013-1772

External References

• http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.33
• http://www.openwall.com/lists/oss-security/2013/02/26/9
• https://bugzilla.redhat.com/show_bug.cgi?id=916075
• https://github.com/torvalds/linux/commit/ce0030c00f95cf9110d9cdcd41e901e1fb814417

Related Security Bulletins

• Buffer overflow in Linux kernel
• Ubuntu update for linux