CVE-2020-25866

moderate-risk

Published 2020-10-06

In Wireshark 3.2.0 to 3.2.6 and 3.0.0 to 3.0.13, the BLIP protocol dissector has a NULL pointer dereference because a buffer was sized for compressed (not uncompressed) messages. This was addressed in epan/dissectors/packet-blip.c by allowing reasonable compression ratios and rejecting ZIP bombs.

Do I need to act?

1.3% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (7)

Wireshark

Fedora

Leap

Zfs Storage Appliance Kit

Affected Vendors

Oracle Fedoraproject Wireshark Opensuse

References (18)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.html

Patch https://gitlab.com/wireshark/wireshark/-/commit/4a948427100b6c109f4ec7b4361f0d2a...

Exploit https://gitlab.com/wireshark/wireshark/-/issues/16866

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Patch https://www.oracle.com/security-alerts/cpujan2021.html

Vendor Advisory https://www.wireshark.org/security/wnpa-sec-2020-13.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.html

Patch https://gitlab.com/wireshark/wireshark/-/commit/4a948427100b6c109f4ec7b4361f0d2a...

Exploit https://gitlab.com/wireshark/wireshark/-/issues/16866

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Patch https://www.oracle.com/security-alerts/cpujan2021.html

Vendor Advisory https://www.wireshark.org/security/wnpa-sec-2020-13.html

/ 100

moderate-risk

Severity 26/34 · High

Exploitability 4/34 · Minimal

Exposure 14/34 · Moderate