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CVE-2021-45955

Published: Dec 31, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-787
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
2.5%
Top 17.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called from FuzzResizePacket and fuzz_rfc1035.c) because of the lack of a proper bounds check upon pseudo header re-insertion. 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." However, a contributor states that a security patch (mentioned in 016162.html) is needed

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

n/an/a
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
DnsmasqSimon Kelley
On-prem
Networking Infrastructure / dns-dhcp-ntp
dnsmasqthekelleys
On-prem
Networking Infrastructure / dns-dhcp-ntp
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
simon kelleyindividual-devNetworking Infrastructure
thekelleysoss-projectNetworking Infrastructureaka dnsmasq, the kellys, thekelleys dnsmasq

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://github.com/google/oss-fuzz-vulns/blob/main/vulns/dnsmasq/OSV-2021-932.yaml
github.com
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35898
bugs.chromium.org
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016162.html
lists.thekelleys.org.uk
and 6 more references View all →

Timeline

Published
Dec 31, 2021
Last Updated
Nov 21, 2024

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