SB2011122002 - Resource management error in Unbound
Published: December 20, 2011 Updated: August 11, 2020
Security Bulletin ID
SB2011122002
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource management error (CVE-ID: CVE-2011-4869)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.
Remediation
Install update from vendor's website.
References
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html
- http://osvdb.org/77910
- http://secunia.com/advisories/47326
- http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt
- http://www.debian.org/security/2011/dsa-2370
- http://www.kb.cert.org/vuls/id/209659
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71868