#VU32833 Input validation error in Unbound - CVE-2011-4528
Published: December 20, 2011 / Updated: July 28, 2020
Vulnerability identifier: #VU32833
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2011-4528
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Unbound
Unbound
Software vendor:
NLnet Labs
NLnet Labs
Description
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
Update to version 1.4.13p2.
External links
- 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