Vulnerability identifier: #VU32833
Vulnerability risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Unbound
Server applications /
DNS servers
Vendor: 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.
Mitigation
Update to version 1.4.13p2.
Vulnerable software versions
Unbound: 1.4.0 - 1.4.13p1
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
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.