SB2013022812 - Buffer overflow in Linux kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Buffer overflow (CVE-ID: CVE-2013-1772)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 5.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

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.

Remediation

Install update from vendor's website.

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