CVE-2023-31147

c-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not seeded by srand() so will generate predictable output. Input from the random number generator is fed into a non-compilant RC4 implementation and may not be as strong as the original RC4 implementation. No attempt is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has been fixed in version 1.19.1.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1	Release Notes
https://github.com/c-ares/c-ares/security/advisories/GHSA-8r8p-23f3-64c2	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202310-09	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:c-ares_project:c-ares:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:37:::::::*
	cpe:2.3:o:fedoraproject:fedora:38:::::::*

History

No history.

Information

Published : 2023-05-25 22:15

Updated : 2023-10-31 16:06

NVD link : CVE-2023-31147

Mitre link : CVE-2023-31147

CVE.ORG link : CVE-2023-31147

JSON object : View

Products Affected

c-ares_project

c-ares

fedoraproject

fedora

CWE

CWE-330

Use of Insufficiently Random Values

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