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Fencer Vulns
high 7.5

CVE-2023-31490 json

An issue found in Frrouting bgpd v.8.4.2 allows a remote attacker to cause a denial of service via the bgp_attr_psid_sub() function.

published 2023-05-09 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-35795

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

An issue found in Frrouting bgpd v.8.4.2 allows a remote attacker to cause a denial of service via the bgp_attr_psid_sub() function.

Patch / fix

  • frr Debian 12 8.4.4-1.1~deb12u1
  • frr Debian 14, Debian 13 8.4.4-1

debian advisories DEBIAN-CVE-2023-31490

  • frr Ubuntu 22.04 LTS 8.1-1ubuntu1.4
  • frr Ubuntu Pro 20.04 LTS 7.2.1-1ubuntu0.2+esm2

ubuntu advisories UBUNTU-CVE-2023-31490

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • frr RHEL 8 7.5.1-22.el8
  • frr-selinux RHEL 8 7.5.1-22.el8
  • frr RHEL 9 8.5.3-4.el9
  • frr-selinux RHEL 9 8.5.3-4.el9

red hat advisories RHSA-2024:2981RHSA-2024:2156

  • frr SLE Module for Server Applications 15 SP6, SLE Module for Server Applications 15 SP5, openSUSE Leap 15.6 +1 more 8.5.6-150500.4.30.1
  • frr SLE Module for Server Applications 15 SP5, openSUSE Leap 15.5 8.4-150500.4.3.1

suse advisories SUSE-SU-2024:4090-1SUSE-SU-2023:2518-1

  • frr openSUSE Tumbleweed 8.4-4.1

opensuse advisories openSUSE-SU-2024:12967-1

  • frr AlmaLinux 8 7.5.1-22.el8
  • frr-selinux AlmaLinux 8 7.5.1-22.el8
  • frr AlmaLinux 9 8.5.3-4.el9
  • frr-selinux AlmaLinux 9 8.5.3-4.el9

almalinux advisories ALSA-2024:2981ALSA-2024:2156

  • frr Rocky Linux 8 7.5.1-22.el8

rocky linux advisories RLSA-2024:2981

  • frr CBL-Mariner 2.0 8.5.1-2

azure linux advisories AZL-26729

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-31490 updated cvss 7.5

frr: missing length check in bgp_attr_psid_sub() can lead do DoS

  • Red Hat Enterprise Linux AppStream (v. 8) frr 7.5.1-22.el8, frr-selinux 7.5.1-22.el8
    fixed: vendor fix RHSA-2024:2981
  • Red Hat Enterprise Linux AppStream (v. 9) frr 8.5.3-4.el9, frr-selinux 8.5.3-4.el9
    fixed: vendor fix RHSA-2024:2156

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.15% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/FRRouting/frr/issues/13099 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.