CVE Database


Impact: Important
Public: 2013-07-26
Bugzilla: 988999: CVE-2013-4854 bind: named crash with an assertion failure on parsing malformed rdata
IAVA: 2013-A-0151


The MITRE CVE dictionary describes this issue as:

The RFC 5011 implementation in rdata.c in ISC BIND 9.7.x and 9.8.x before 9.8.5-P2, 9.8.6b1, 9.9.x before 9.9.3-P2, and 9.9.4b1, and DNSco BIND 9.9.3-S1 before 9.9.3-S1-P1 and 9.9.4-S1b1, allows remote attackers to cause a denial of service (assertion failure and named daemon exit) via a query with a malformed RDATA section that is not properly handled during construction of a log message, as exploited in the wild in July 2013.

Find out more about CVE-2013-4854 from the MITRE CVE dictionary and NIST NVD.


This issue did not affect the versions of bind as shipped with Red Hat Enterprise Linux 5. It does affect the versions of bind97 as shipped with Red Hat Enterprise Linux 5 and the versions of bind as shipped with Red Hat Enterprise Linux 6.

CVSS v2 metrics

Base Score: 5.0
Base Metrics: AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector: Network
Access Complexity: Low
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Partial

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

Red Hat security errata

Platform Errata Release Date
Red Hat Enterprise Linux version 5 (bind97) RHSA-2013:1115 July 30, 2013
Red Hat Enterprise Linux version 6 (bind) RHSA-2013:1114 July 30, 2013

External References

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For clarification or corrections please contact the Red Hat Security Response Team.