Vulnerability identifier: #VU33536

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7704

CWE-ID: CWE-835

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 a denial of service (DoS) attack.

In Wireshark 2.2.0 to 2.2.5, the DOF dissector could go into an infinite loop, triggered by packet injection or a malformed capture file. This was addressed in epan/dissectors/packet-dof.c by using a different integer data type and adjusting a return value.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Wireshark: 2.2.0 - 2.2.5

---

External links
http://www.securityfocus.com/bid/97634
http://www.securitytracker.com/id/1038262
http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13453
http://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=6032b0fe5fc1176ab77e03e20765f95fbd21b19e
http://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=da53a90b6895e47e03c5de05edf84bd99d535fd8
http://security.gentoo.org/glsa/201706-12
http://www.wireshark.org/security/wnpa-sec-2017-17.html

---

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.