SB2011122001 - Input validation error in Unbound
Published: December 20, 2011 Updated: July 28, 2020
Security Bulletin ID
SB2011122001
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) Input validation error (CVE-ID: CVE-2011-4528)
The vulnerability allows remote DNS servers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (daemon crash) via a crafted response. Per: http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt "1.4.14 is released with the patch, but 1.4.14rc1 is vulnerable.
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/77909
- 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