CVE-2023-31124 — Use of Insufficiently Random Values in C-ares

CWE-330 — Use of Insufficiently Random Values6 documents6 sources
Severity
3.7LOWNVD
EPSS
0.1%
top 77.48%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
C-aresC-ares Project C-aresFedoraproject Fedora
Timeline
PublishedMay 25

Description

c-ares is an asynchronous resolver library. When cross-compiling c-ares and using the autotools build system, CARES_RANDOM_FILE will not be set, as seen when cross compiling aarch64 android. This will downgrade to using rand() as a fallback which could allow an attacker to take advantage of the lack of entropy by not using a CSPRNG. This issue was patched in version 1.19.1.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:NExploitability: 2.2 | Impact: 1.4

Affected Packages3 packages

▶CVEListV5c-ares/c-ares< 1.19.1
▶NVDc-ares_project/c-ares< 1.19.1
▶Debianc-ares/c-ares< 1.19.1-2+1

Also affects: Fedora 37, 38

🔴Vulnerability Details

2
CVEList
AutoTools does not set CARES_RANDOM_FILE during cross compilation↗2023-05-25
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OSV
CVE-2023-31124: c-ares is an asynchronous resolver library↗2023-05-25
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📋Vendor Advisories

3
Red Hat
c-ares: AutoTools does not set CARES_RANDOM_FILE during cross compilation↗2023-05-22
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Microsoft
AutoTools does not set CARES_RANDOM_FILE during cross compilation↗2023-05-09
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Debian
CVE-2023-31124: c-ares - c-ares is an asynchronous resolver library. When cross-compiling c-ares and usin...↗2023
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CVE-2023-31124 — Use of Insufficiently Random Values | cvebase