CVE-2023-38802

Name: CVE-2023-38802
Creator: NVD / NIST
Published: 2023-08-29T16:15:09.113+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.44%

Last modified Jun 17, 2026

CVE-2023-38802 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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).. EPSS estimates a 1.44% chance of exploitation in the next 30 days.

Description

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).

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.44%

69.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-354

Affected Software

Vendor	Product	Versions
Frrouting	Frrouting	>= 7.5.1, <= 9.0
Pica8	Picos	4.3.3.2
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0
Debian	Debian Linux	12.0
Fedoraproject	Fedora	37
Fedoraproject	Fedora	38
Fedoraproject	Fedora	39

References

https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handlingExploit, Technical Description, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00020.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JLG64IF3FU7V76K4TKCCXVNEE6P2VUDO/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LMJNX44SMJM25JZO7XWHDQCOB4SNJPIE/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXR6PIVY4SWO7HDT4EY733H4X32SCPM4/Mailing List
https://news.ycombinator.com/item?id=37305800Third Party Advisory
https://www.debian.org/security/2023/dsa-5495Third Party Advisory
https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handlingExploit, Technical Description, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00020.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JLG64IF3FU7V76K4TKCCXVNEE6P2VUDO/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LMJNX44SMJM25JZO7XWHDQCOB4SNJPIE/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXR6PIVY4SWO7HDT4EY733H4X32SCPM4/Mailing List
https://news.ycombinator.com/item?id=37305800Third Party Advisory
https://www.debian.org/security/2023/dsa-5495Third Party Advisory

Timeline

Published: Aug 29, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-38802?

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).

How severe is CVE-2023-38802?

CVE-2023-38802 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.44% probability of exploitation in the next 30 days.

How do I fix CVE-2023-38802?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-38802?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST