CVE-2021-45957

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-45957
** DISPUTED ** Dnsmasq 2.86 has a heap-based buffer overflow in answer_request (called from FuzzAnswerTheRequest and fuzz_rfc1035.c). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge."

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5 /10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References
Link Resource
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35920 Exploit Issue Tracking Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yaml Third Party Advisory
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html Mailing List Third Party Advisory
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html Mailing List Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35920 Exploit Issue Tracking Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yaml Third Party Advisory
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html Mailing List Third Party Advisory
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html Mailing List Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:thekelleys:dnsmasq:2.86:*:*:*:*:*:*:*
History

21 Nov 2024, 06:33

Type Values Removed Values Added
References () https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35920 - Exploit, Issue Tracking, Third Party Advisory () https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35920 - Exploit, Issue Tracking, Third Party Advisory
References () https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yaml - Third Party Advisory () https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yaml - Third Party Advisory
References () https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html - Mailing List, Third Party Advisory () https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html - Mailing List, Third Party Advisory
References () https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html - Mailing List, Third Party Advisory () https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html - Mailing List, Third Party Advisory

18 Mar 2022, 13:31

Type Values Removed Values Added
References (MISC) https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html - (MISC) https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html - Mailing List, Third Party Advisory
References (MISC) https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yaml - Exploit, Third Party Advisory (MISC) https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yaml - Third Party Advisory
References (MISC) https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html - (MISC) https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html - Mailing List, Third Party Advisory

19 Feb 2022, 22:15

Type Values Removed Values Added
References
  • (MISC) https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html -
  • (MISC) https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016164.html -
Summary Dnsmasq 2.86 has a heap-based buffer overflow in answer_request (called from FuzzAnswerTheRequest and fuzz_rfc1035.c). ** DISPUTED ** Dnsmasq 2.86 has a heap-based buffer overflow in answer_request (called from FuzzAnswerTheRequest and fuzz_rfc1035.c). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge."

11 Jan 2022, 17:59

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : 7.5
v3 : 9.8
CWE CWE-787
References (MISC) https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yaml - (MISC) https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-935.yaml - Exploit, Third Party Advisory
References (MISC) https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35920 - (MISC) https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35920 - Exploit, Issue Tracking, Third Party Advisory
CPE cpe:2.3:a:thekelleys:dnsmasq:2.86:*:*:*:*:*:*:*

01 Jan 2022, 00:15

Type Values Removed Values Added
New CVE
Information

Published : 2022-01-01 00:15

Updated : 2024-11-21 06:33

NVD link : CVE-2021-45957

Mitre link : CVE-2021-45957

CVE.ORG link : CVE-2021-45957

JSON object : View

Products Affected

thekelleys

  • dnsmasq
CWE
CWE-787

Out-of-bounds Write