Skip to content
Fencer Vulns
high 7.5

CVE-2023-38802 json

FRRouting FRR 7.5.1 through 9.0 and Pica8 PICOS 4.3.3.2 allow a remote attacker to cause a denial of service via a crafted BGP update with…

published 2023-08-29 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-42575

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

FRRouting FRR 7.5.1 through 9.0 and Pica8 PICOS 4.3.3.2 allow a remote attacker to cause a denial of service via a crafted BGP update with a corrupted attribute 23 (Tunnel Encapsulation).

Patch / fix

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

debian advisories DEBIAN-CVE-2023-38802

  • frr Ubuntu 22.04 LTS 8.1-1ubuntu1.5
  • frr Ubuntu Pro 20.04 LTS 7.2.1-1ubuntu0.2+esm2

ubuntu advisories UBUNTU-CVE-2023-38802

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 7.5.1-7.el8_8.2
  • frr-selinux RHEL 8 7.5.1-7.el8_8.2
  • frr RHEL 9 8.3.1-5.el9_2.2
  • frr-selinux RHEL 9 8.3.1-5.el9_2.2
  • frr RHEL 8.1 E4S 7.0-5.el8_1.1
  • frr-contrib RHEL 8.1 E4S 7.0-5.el8_1.1
  • frr RHEL 8.2 TUS, RHEL 8.2 E4S, RHEL 8.2 AUS 7.0-5.el8_2.1
  • frr-contrib RHEL 8.2 TUS, RHEL 8.2 E4S, RHEL 8.2 AUS 7.0-5.el8_2.1

red hat advisories RHSA-2023:5464RHSA-2023:5465RHSA-2023:5457RHSA-2023:5219RHSA-2023:5195RHSA-2023:5196

  • 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
  • quagga SLE Module for Server Applications 15 SP5, SLE Module for Server Applications 15 SP4, openSUSE Leap 15.5 +1 more 1.1.1-150400.12.5.1
  • quagga SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES for SAP 15 SP1 +10 more 1.1.1-150000.4.3.1
  • quagga SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.1.1-17.10.1
  • frr SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Module for Server Applications 15 SP4 +6 more 7.4-150300.4.17.1
  • frr SLE Module for Server Applications 15 SP5, openSUSE Leap 15.5 8.4-150500.4.8.1

suse advisories SUSE-SU-2024:4090-1SUSE-SU-2023:3839-1SUSE-SU-2023:3836-1SUSE-SU-2023:3793-1SUSE-SU-2023:3762-1SUSE-SU-2023:3709-1

  • frr openSUSE Tumbleweed 8.4-5.1

opensuse advisories openSUSE-SU-2024:13191-1

  • frr AlmaLinux 8 7.5.1-7.el8_8.2.alma.1
  • frr-selinux AlmaLinux 8 7.5.1-7.el8_8.2.alma.1
  • frr AlmaLinux 9 8.3.1-5.el9_2.2.alma
  • frr-selinux AlmaLinux 9 8.3.1-5.el9_2.2.alma

almalinux advisories ALSA-2023:5219ALSA-2023:5194

  • frr CBL-Mariner 2.0 8.5.3-2

azure linux advisories AZL-28614

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-2023-38802 updated cvss 7.5

frr: Incorrect handling of a error in parsing of an invalid section of a BGP update can de-peer a router

  • Red Hat Enterprise Linux AppStream (v. 8) frr 7.5.1-7.el8_8.2, frr-selinux 7.5.1-7.el8_8.2
    fixed: vendor fix RHSA-2023:5219
  • Red Hat Enterprise Linux AppStream (v. 9) frr 8.3.1-5.el9_2.2, frr-selinux 8.3.1-5.el9_2.2
    fixed: vendor fix RHSA-2023:5194
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) frr 7.0-5.el8_2.1, frr-contrib 7.0-5.el8_2.1
    fixed: vendor fix RHSA-2023:5465
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) frr 7.5-4.el8_4.4
    fixed: vendor fix RHSA-2023:5196
  • Red Hat Enterprise Linux AppStream E4S (v. 8.1) frr 7.0-5.el8_1.1, frr-contrib 7.0-5.el8_1.1
    fixed: vendor fix RHSA-2023:5464
  • Red Hat Enterprise Linux AppStream E4S (v. 8.2) frr 7.0-5.el8_2.1, frr-contrib 7.0-5.el8_2.1
    fixed: vendor fix RHSA-2023:5465
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) frr 7.5-4.el8_4.4
    fixed: vendor fix RHSA-2023:5196
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) frr 7.5-11.el8_6.2
    fixed: vendor fix RHSA-2023:5195
show 3 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) frr 8.0-5.el9_0.1
    fixed: vendor fix RHSA-2023:5457
  • Red Hat Enterprise Linux AppStream TUS (v. 8.2) frr 7.0-5.el8_2.1, frr-contrib 7.0-5.el8_2.1
    fixed: vendor fix RHSA-2023:5465
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) frr 7.5-4.el8_4.4
    fixed: vendor fix RHSA-2023:5196

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 ICSA-24-102-04 updated cvss 7.5

Siemens RUGGEDCOM APE1808

  • Siemens RUGGEDCOM APE1808
    affected: vendor fix

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • blog.benjojo.co.uk https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling 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

Classification

Weakness
  • CWE-354 Improper Validation of Integrity Check Value

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.