Gentoo update for Unbound

Published: 2013-11-28 | Updated: 2016-09-25

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2011-4528 CVE-2011-4869
CWE-ID	CWE-20 CWE-399
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Gentoo Linux Operating systems & Components / Operating system
Vendor	Gentoo

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU32833

Risk: Medium

CVSSv4.0: 2.7 [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 - Improper input validation

Exploit availability: No

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 the affected packages.
net-dns/unbound to version:

Vulnerable software versions

Gentoo Linux: All versions

CPE2.3

cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*

External links

https://security.gentoo.org/
https://security.gentoo.org/glsa/201311-18

Q & A

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.

2) Resource management error

EUVDB-ID: #VU44440