Medium severity · published Feb 23, 2024
CVE-2024-25629
c-ares is a C library for asynchronous DNS requests
5.5
CVSS
0.4%
EPSS
No
On KEV
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
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
C-ares · C-ares
before 1.27.0 · source: NVD
FE
Fedora · Fedoraproject
38; 39; 40 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-25629
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-25629
Patch
https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183
Vendor Advisory
https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/
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