Input validation error in Linux kernel - CVE-2011-2723
Published: September 6, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU44753
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-2723
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The skb_gro_header_slow function in include/linux/netdevice.h in the Linux kernel before 2.6.39.4, when Generic Receive Offload (GRO) is enabled, resets certain fields in incorrect situations, which allows remote attackers to cause a denial of service (system crash) via crafted network traffic.
Affected software
Linux kernel
Amazon Linux AMI
Amazon Linux AMI
How to mitigate CVE-2011-2723
Install update from vendor's website.
Linux kernel - update to 2.6.39.4
External References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=17dd759c67f21e34f2156abcf415e1f60605a188
- http://marc.info/?l=bugtraq&m=139447903326211&w=2
- http://openwall.com/lists/oss-security/2011/07/28/13
- http://openwall.com/lists/oss-security/2011/07/29/1
- http://securitytracker.com/id?1025876
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.4
- http://www.redhat.com/support/errata/RHSA-2011-1321.html
- http://www.securityfocus.com/bid/48929
- https://bugzilla.redhat.com/show_bug.cgi?id=726552