CVE-2018-14340
In Wireshark 2.6.0 to 2.6.1, 2.4.0 to 2.4.7, and 2.2.0 to 2.2.15, dissectors that support zlib decompression could crash.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In Wireshark 2.6.0 to 2.6.1, 2.4.0 to 2.4.7, and 2.2.0 to 2.2.15, dissectors that support zlib decompression could crash. This was addressed in epan/tvbuff_zlib.c by rejecting negative lengths to avoid a buffer over-read.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.47% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- wireshark/wireshark · debian/debian linux
- Source
- cve@mitre.org
EPSS 3.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html
- http://www.securityfocus.com/bid/104847Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041608Third Party Advisory, VDB Entry
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14675Exploit, Issue Tracking, Vendor Advisory
- https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=672d882a53f96730e4ef1e5b1639c585823b0df8
- https://lists.debian.org/debian-lts-announce/2018/07/msg00045.htmlMailing List, Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2018-36.htmlVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00027.html
- http://www.securityfocus.com/bid/104847Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041608Third Party Advisory, VDB Entry
- https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14675Exploit, Issue Tracking, Vendor Advisory
- https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=672d882a53f96730e4ef1e5b1639c585823b0df8
- https://lists.debian.org/debian-lts-announce/2018/07/msg00045.htmlMailing List, Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2018-36.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.