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CVE-2024-25629

c-ares out of bounds read in ares__read_line()

Published: Feb 23, 2024Updated: Feb 5, 2025 Sources: CVE List NVD BDUCWE-127
NVD MITRE
4.4CVSSMEDIUM
EPSS Score
0.4%
Top 73.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.

CVSS Vector Breakdown

AV:LAC:LPR:HUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-127CWE-125

Affected Products

c-aresc-ares
Library
OSS Libraries / generic-library
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
ROSA VirtualizationАО «НТЦ ИТ РОСА»
On-prem
Operating Systems / linux-distro
РОСА ХРОМАО «НТЦ ИТ РОСА»
On-prem
Operating Systems / linux-distro
c-aresoss-projectOSS Libraries
ооо «ред софт»commercialRUOperating Systemsaka red soft
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «нтц ит роса»commercialRUOperating Systems
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q
github.com
https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183
github.com
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/
lists.fedoraproject.org
and 15 more references View all →

Timeline

Published
Feb 23, 2024
Last Updated
Feb 5, 2025

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