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CVE-2020-25866

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Date: October 6, 2020

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.

Language: C

Severity Score

Related Resources (17)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DQHPKZFQ7W3X34RYN3FWFYCFJD4FXJW/
https://nvd.nist.gov/vuln/detail/CVE-2020-25866
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.html
https://www.wireshark.org/security/wnpa-sec-2020-13.html
https://gitlab.com/wireshark/wireshark/-/commit/4a948427100b6c109f4ec7b4361f0d2aec5e5c3f
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUHMK5HYTUUDXA64T2TAMAFMYV674QBW/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DQHPKZFQ7W3X34RYN3FWFYCFJD4FXJW/
https://www.oracle.com/security-alerts/cpujan2021.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-25866
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6IGRYKW4XLR44YDWTAH547ODYYBYPB2D/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZUHMK5HYTUUDXA64T2TAMAFMYV674QBW/
https://security.alpinelinux.org/vuln/CVE-2020-25866
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.html
https://security-tracker.debian.org/tracker/CVE-2020-25866
https://gitlab.com/wireshark/wireshark/-/issues/16866
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGRYKW4XLR44YDWTAH547ODYYBYPB2D/
https://www.mend.io/vulnerability-database/CVE-2020-25866

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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