Input validation error in Linux kernel - CVE-2012-4565
Published: December 21, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43237
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2012-4565
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading TCP stats.
How to mitigate CVE-2012-4565
Install update from vendor's website.
Sources
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664
- http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091110.html
- http://rhn.redhat.com/errata/RHSA-2012-1580.html
- http://secunia.com/advisories/51409
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.19
- http://www.openwall.com/lists/oss-security/2012/10/31/5
- http://www.securityfocus.com/bid/56346
- http://www.ubuntu.com/usn/USN-1644-1
- http://www.ubuntu.com/usn/USN-1645-1
- http://www.ubuntu.com/usn/USN-1646-1
- http://www.ubuntu.com/usn/USN-1647-1
- http://www.ubuntu.com/usn/USN-1648-1
- http://www.ubuntu.com/usn/USN-1649-1
- http://www.ubuntu.com/usn/USN-1650-1
- http://www.ubuntu.com/usn/USN-1651-1
- http://www.ubuntu.com/usn/USN-1652-1
- https://bugzilla.redhat.com/show_bug.cgi?id=871848
- https://github.com/torvalds/linux/commit/8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664