CVE-2021-39921

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-39921
NULL pointer exception in the Modbus 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

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

5.0 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39921.json Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/17703 Exploit Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/
https://security.gentoo.org/glsa/202210-04 Third Party Advisory
https://www.debian.org/security/2021/dsa-5019 Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2021-14.html Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
History

07 Nov 2023, 03:37

Type Values Removed Values Added
References
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/', 'name': 'FEDORA-2021-3747cf6107', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/', 'name': 'FEDORA-2021-97bd631e0a', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/ -
  • () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/ -

28 Oct 2022, 20:09

Type Values Removed Values Added
References (GENTOO) https://security.gentoo.org/glsa/202210-04 - (GENTOO) https://security.gentoo.org/glsa/202210-04 - Third Party Advisory

16 Oct 2022, 17:15

Type Values Removed Values Added
References
  • (GENTOO) https://security.gentoo.org/glsa/202210-04 -

09 Mar 2022, 21:42

Type Values Removed Values Added
References (MLIST) https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html - (MLIST) https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html - Mailing List, Third Party Advisory
First Time Debian
Debian debian Linux
CPE cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

26 Dec 2021, 22:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2021/12/msg00015.html -

16 Dec 2021, 18:41

Type Values Removed Values Added
References (DEBIAN) https://www.debian.org/security/2021/dsa-5019 - (DEBIAN) https://www.debian.org/security/2021/dsa-5019 - Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/ - Mailing List, Third Party Advisory
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/ - Mailing List, Third Party Advisory
CPE cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

11 Dec 2021, 12:15

Type Values Removed Values Added
References
  • (DEBIAN) https://www.debian.org/security/2021/dsa-5019 -

03 Dec 2021, 03:15

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/ -
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/ -

24 Nov 2021, 13:57

Type Values Removed Values Added
CWE CWE-476
CVSS v2 : unknown
v3 : unknown 		v2 : 5.0
v3 : 7.5
CPE cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*
References (MISC) https://gitlab.com/wireshark/wireshark/-/issues/17703 - (MISC) https://gitlab.com/wireshark/wireshark/-/issues/17703 - Exploit, Issue Tracking, Patch, Third Party Advisory
References (CONFIRM) https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39921.json - (CONFIRM) https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39921.json - Third Party Advisory
References (MISC) https://www.wireshark.org/security/wnpa-sec-2021-14.html - (MISC) https://www.wireshark.org/security/wnpa-sec-2021-14.html - Vendor Advisory

19 Nov 2021, 18:15

Type Values Removed Values Added
New CVE
Information

Published : 2021-11-19 17:15

Updated : 2023-12-10 14:09

NVD link : CVE-2021-39921

Mitre link : CVE-2021-39921

CVE.ORG link : CVE-2021-39921

JSON object : View

Products Affected

debian

  • debian_linux

fedoraproject

  • fedora

wireshark

  • wireshark
CWE
CWE-476

NULL Pointer Dereference