Public Date:
968036: CVE-2013-2850 kernel: iscsi-target: heap buffer overflow on large key error

The MITRE CVE dictionary describes this issue as:

Heap-based buffer overflow in the iscsi_add_notunderstood_response function in drivers/target/iscsi/iscsi_target_parameters.c in the iSCSI target subsystem in the Linux kernel through 3.9.4 allows remote attackers to cause a denial of service (memory corruption and OOPS) or possibly execute arbitrary code via a long key that is not properly handled during construction of an error-response packet.

Find out more about CVE-2013-2850 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 and 6 as those versions do not provide support for in-kernel iSCSI target. Future kernel updates in Red Hat Enterprise Linux MRG 2 may address this flaw.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.8
Base Metrics AV:A/AC:H/Au:N/C:C/I:C/A:C
Access Vector Adjacent Network
Access Complexity High
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
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
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2013:1264 2013-09-16

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 kernel Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected


Red Hat would like to thank Kees Cook for reporting this issue.