#VU43260 Input validation error in Wireshark - CVE-2012-6056

Vulnerability identifier: #VU43260

Vulnerability 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-2012-6056

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Wireshark
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Wireshark.org

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Integer overflow in the dissect_sack_chunk function in epan/dissectors/packet-sctp.c in the SCTP dissector in Wireshark 1.8.x before 1.8.4 allows remote attackers to cause a denial of service (infinite loop) via a crafted Duplicate TSN count.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Wireshark: 1.8.0 - 1.8.3

---

External links
https://anonsvn.wireshark.org/viewvc/trunk/epan/dissectors/packet-sctp.c?r1=45355&r2=45354&pathrev=45355
https://anonsvn.wireshark.org/viewvc?view=revision&revision=45355
https://lists.opensuse.org/opensuse-updates/2012-12/msg00022.html
https://lists.opensuse.org/opensuse-updates/2013-01/msg00042.html
https://rhn.redhat.com/errata/RHSA-2014-0341.html
https://www.wireshark.org/security/wnpa-sec-2012-33.html
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7802
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16139

---

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.