Vulnerability in C-ares
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 gener…
EPSS: 0.009 (55.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- C-ares — versions < 1.19.1
- C-ares_project C-ares
- Fedoraproject Fedora — versions 37, 38
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (Mailing List, Third Party Advisory)
- security-advisories@github.com (Mailing List, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-31147?
- CVE-2023-31147 is a medium-severity vulnerability in C-ares, classified under Use of Insufficiently Random Values. CVSS score: 5.9/10. Published 2023-05-25.
- How severe is CVE-2023-31147?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2023-31147 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.