CVE-2020-22217: c-ares Out-of-bounds Read
CVSS: 5.9v3.1MediumModified
AliasesSUSE-SU-2023:3690-1RHSA-2024:0419RHSA-2024:0578UBUNTU-CVE-2020-22217USN-6376-1DEBIAN-CVE-2020-22217DLA-3567-1
Published 22-08-2023Last modified 03-10-2024
Vulnerability summary
CVE-2020-22217 is a medium (CVSS 5.9) Out-of-bounds Read vulnerability in c-ares. EPSS estimates a 0.98% chance of exploitation in the next 30 days, higher than 61.5% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.9/10
010
Medium · v3.1 (NVD)EPSS score
0.98%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 22-08-2023PublishedVulnerability first disclosed.
- 03-10-2024Last modifiedVulnerability information updated.
Description
Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function ares_parse_soa_reply in ares_parse_soa_reply.c.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 5.9Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · Red hatEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.98%
Chance of exploitation in the next 30 days
Percentile
62%
Versus all other CVEs
30-day change
0.00 pp
From 0.98% on 20-09-2026
20-09-202620-10-2026
EPSS score0.98%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundC Ares
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Redhat4 products
- c-ares< 0:1.13.0-6.el8_6.3 | < 0:1.13.0-6.el8_8.4
- c-ares-debuginfo< 0:1.13.0-6.el8_6.3 | < 0:1.13.0-6.el8_8.4
- c-ares-debugsource< 0:1.13.0-6.el8_6.3 | < 0:1.13.0-6.el8_8.4
- c-ares-devel< 0:1.13.0-6.el8_6.3 | < 0:1.13.0-6.el8_8.4
Suse4 products
- libcares2&distro=SUSE Linux Enterprise Server 12 SP5< 1.9.1-9.18.1
- libcares2&distro=SUSE Linux Enterprise Server for SAP Applications 12 SP5< 1.9.1-9.18.1
- libcares2&distro=SUSE Linux Enterprise Software Development Kit 12 SP5< 1.9.1-9.18.1
- libcares2&distro=SUSE Linux Enterprise Workstation Extension 12 SP5< 1.9.1-9.18.1
Debian2 products
- c-ares< 1.17.1-1 | < 1.14.0-1+deb10u4
- debian_linuxEOL10.0
C-ares1 product
- c-ares1.16.1 | 1.17.0
Ubuntu1 product
- c-aresAll versions (No fix recorded) | < 1.15.0-1ubuntu0.4
5 vendors · 12 products
