Infinite loop in Wireshark and Debian Linux - CVE-2017-7746
Published: April 13, 2017 / Updated: August 8, 2020
Vulnerability identifier: #VU39202
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2017-7746
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Wireshark.org
Debian
Debian
Affected software:
Wireshark
Debian Linux
Wireshark
Debian Linux
Detailed vulnerability 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 SLSK dissector could go into an infinite loop, triggered by packet injection or a malformed capture file. This was addressed in epan/dissectors/packet-slsk.c by adding checks for the remaining length.
How to mitigate CVE-2017-7746
Install update from vendor's website.
Sources
- http://www.securityfocus.com/bid/97635
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13576
- https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=58e69cc769dea24b721abd8a29f9eedc11024b7e
- https://lists.debian.org/debian-lts-announce/2019/01/msg00010.html
- https://www.wireshark.org/security/wnpa-sec-2017-19.html