CVE-2013-4854

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

34.2% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2013-07-29 13:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:58 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 34.2% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2013-07-29 13:59 UTC

Last modified

2026-06-16 23:58 UTC

Exploit probability

34.2% · EPSS, next 30 days

Record status

Modified

Affected

• Isc Bind 9.7.0
• Isc Bind 9.7.1
• Isc Bind 9.7.2
• Isc Bind 9.7.3
• Isc Bind 9.7.4
• Isc Bind 9.7.5
• Isc Bind 9.7.6
• Isc Bind 9.7.7

Attack profile CVSS 2.0 · 7.8

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

Is it in your code?

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