PT-2011-5151 · Nlnet · Unbound

Christopher Olah · Published 2011-12-20 · Updated 2017-08-29 · CVE-2011-4869

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Unbound versions prior to 1.4.13p2

Description The issue is related to improper proof processing for NSEC3-signed zones in the validator/val nsec3.c component. This can be exploited by remote DNS servers sending a malformed response that lacks expected NSEC3 records, leading to a denial of service (daemon crash).

Recommendations For versions prior to 1.4.13p2, update to version 1.4.13p2 or later to resolve the issue.

Fix

Weakness Enumeration

CWE-399

Related Identifiers

CVE-2011-4869

DSA-2370-1

Affected Products

Unbound

References · 12

• http://kb.cert.org/vuls/id/209659 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2011-4869 · Security Note
• http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt · Vendor Advisory
• http://debian.org/security/2011/dsa-2370 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2011-4869 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2011-4869 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2011-4869 · Vendor Advisory
• https://exchange.xforce.ibmcloud.com/vulnerabilities/71868 · Note
• http://secunia.com/advisories/47326 · Note
• http://osvdb.org/77910 · Note