Vulnerability identifier: #VU33535

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-2017-7703

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Wireshark
Server applications / IDS/IPS systems, Firewalls and proxy servers
Debian Linux
Operating systems & Components / Operating system

Vendor: Wireshark.org
Debian

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 and 2.0.0 to 2.0.11, the IMAP dissector could crash, triggered by packet injection or a malformed capture file. This was addressed in epan/dissectors/packet-imap.c by calculating a line's end correctly.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Wireshark: 2.0.0 - 2.0.11, 2.2.0 - 2.2.5

Debian Linux: 2.0.0 - 8.0

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External links
http://www.securityfocus.com/bid/97636
http://www.securitytracker.com/id/1038262
http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13466
http://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=671e32820ab29d41d712cc8a472eab9b672684d9
http://lists.debian.org/debian-lts-announce/2019/01/msg00010.html
http://security.gentoo.org/glsa/201706-12
http://www.wireshark.org/security/wnpa-sec-2017-12.html

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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.