CVE-2011-2723

Impact:
Moderate
Public Date:
2011-07-27
Bugzilla:
726552: CVE-2011-2723 kernel: gro: only reset frag0 when skb can be pulled

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2011-2723 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not backport the upstream commit a5b1cf28 that introduced this issue. This has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-1386.html, https://rhn.redhat.com/errata/RHSA-2011-1350.html, and https://rhn.redhat.com/errata/RHSA-2012-0010.html.

CVSS v2 metrics

Base Score 5.7
Base Metrics AV:A/AC:M/Au:N/C:N/I:N/A:C
Access Vector Adjacent Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
RHEV Agents (VDSM) RHSA-2011:1408 2011-10-26
Red Hat Enterprise Linux 5 (kernel) RHSA-2011:1321 2011-09-20
Red Hat Enterprise Linux 5 (kernel) RHSA-2011:1386 2011-10-20
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2012:0010 2012-01-10
Red Hat Enterprise Linux 6 (kernel) RHSA-2011:1350 2011-10-05
Red Hat Enterprise Linux EUS (v. 5.6 server) RHSA-2011:1321 2011-09-20

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 4 kernel Not affected

Acknowledgements

Red Hat would like to thank Brent Meshier for reporting this issue.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation