Vulnerability identifier: #VU42671

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-4115

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Opensuse
Operating systems & Components / Operating system
Squid
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: SUSE
Squid-cache.org

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Buffer overflow in the idnsALookup function in dns_internal.cc in Squid 3.2 through 3.2.11 and 3.3 through 3.3.6 allows remote attackers to cause a denial of service (memory corruption and server termination) via a long name in a DNS lookup request.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Opensuse: 11.4 - 12.3

Squid: 3.2.0.1 - 3.3.6

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External links
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00024.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00025.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00030.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00032.html
http://lists.opensuse.org/opensuse-updates/2013-09/msg00033.html
http://secunia.com/advisories/54076
http://secunia.com/advisories/54834
http://secunia.com/advisories/54839
http://www.openwall.com/lists/oss-security/2013/07/11/8
http://www.securityfocus.com/bid/61111
http://www.squid-cache.org/Advisories/SQUID-2013_2.txt
http://www.squid-cache.org/Versions/v3/3.0/changesets/squid-3.0-9200.patch
http://www.squid-cache.org/Versions/v3/3.1/changesets/squid-3.1-10487.patch
http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11823.patch
http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12587.patch
http://exchange.xforce.ibmcloud.com/vulnerabilities/85564

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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.