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CVE-2021-39923

Date: November 19, 2021

Large loop in the PNRP dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file

Language: C

Severity Score

7.5

Related Resources (13)

Url: https://www.debian.org/security/2021/dsa-5019

Url: https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html

Url: https://security-tracker.debian.org/tracker/CVE-2021-39923

Url: https://gitlab.com/wireshark/wireshark/-/issues/17684

Url: https://www.wireshark.org/security/wnpa-sec-2021-15.html

Url: https://www.wireshark.org/security/wnpa-sec-2021-11.html

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/

Url: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2021-39923

Url: https://nvd.nist.gov/vuln/detail/CVE-2021-39923

Url: https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39923.json

Url: https://gitlab.com/wireshark/wireshark/-/issues/17705

Url: https://www.mend.io/vulnerability-database/CVE-2021-39923

Severity Score

7.5

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

Excessive Iteration

CWE-834

CVSS v3.1

Base Score:	7.5
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:	5.0
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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