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Fencer Intel
high 7.5

CVE-2024-55553 json

In FRRouting (FRR) before 10.3 from 6.0 onward, all routes are re-validated if the total size of an update received via RTR exceeds the int…

published last yr. modified 4mo ago also EUVD-2024-52804

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

In FRRouting (FRR) before 10.3 from 6.0 onward, all routes are re-validated if the total size of an update received via RTR exceeds the internal socket's buffer size, default 4K on most OSes. An attacker can use this to trigger re-parsing of the RIB for FRR routers using RTR by causing more than this number of updates during an update interval (usually 30 minutes). Additionally, this effect regularly occurs organically. Furthermore, an attacker can use this to trigger route validation continuously. Given that routers with large full tables may need more than 30 minutes to fully re-validate the table, continuous issuance/withdrawal of large numbers of ROA may be used to impact the route handling performance of all FRR instances using RPKI globally. Additionally, the re-validation will cause heightened BMP traffic to ingestors. Fixed Versions: 10.0.3, 10.1.2, 10.2.1, >= 10.3.

Patch / fix

  • frr Debian 14, Debian 13 10.2.1-1

debian advisories DEBIAN-CVE-2024-55553

  • frr Ubuntu 22.04 LTS 8.1-1ubuntu1.17
  • frr Ubuntu 24.04 LTS 8.4.4-1.1ubuntu6.8
  • frr Ubuntu Pro 20.04 LTS 7.2.1-1ubuntu0.2+esm5

ubuntu advisories UBUNTU-CVE-2024-55553

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 SLE Module for Server Applications 15 SP7, SLE Module for Server Applications 15 SP6, openSUSE Leap 15.6 8.5.6-150500.4.33.1
  • frr SLES LTSS Extended Security 12 SP5 8.5.6-8.6.1

suse advisories SUSE-SU-2025:03453-1SUSE-SU-2025:03297-1

  • frr openSUSE Tumbleweed 10.2.1-1.1

opensuse advisories openSUSE-SU-2025:14632-1

  • frr Azure Linux 3.0 9.1.1-3
  • frr CBL-Mariner 2.0 8.5.5-3

azure linux advisories AZL-55066AZL-55115

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

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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-2024-55553 updated cvss 7.5

frr: DoS via repeated RIB revalidation

  • Red Hat Enterprise Linux 8 frr, frr-contrib, frr-selinux Red Hat Enterprise Linux 9 frr, frr-selinux Red Hat Enterprise Linux 10 frr
    not affected: vulnerable code not present

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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

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

Classification

Weakness
  • CWE-404 Improper Resource Shutdown or Release

References

Sources

Fencer Intel 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.