CVE-2023-38802

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

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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).

FRRouting FRR 7.5.1 a 9.0 y Pica8 PICOS 4.3.3.2 permiten a un atacante remoto causar una denegación de servicio a través de una actualización BGP manipulada con un atributo dañado 23 (encapsulación de túnel).

A vulnerability was found in FRRouting (FRR). This flaw allows a remote attacker to cause a denial of service issue via a crafted BGP update with a corrupted attribute 23 (Tunnel Encapsulation).

*Credits: N/A

CVSS Scores

NISTv3.1 7.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

Poc

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-07-25 CVE Reserved
2023-08-29 CVE Published
2024-09-30 EPSS Updated
2024-10-02 CVE Updated
2024-10-02 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation
CWE-354: Improper Validation of Integrity Check Value

CAPEC

References (9)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2023/09/msg00020.html	Mailing List
https://news.ycombinator.com/item?id=37305800	Third Party Advisory

URL	Date	SRC
https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling	2024-10-02

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JLG64IF3FU7V76K4TKCCXVNEE6P2VUDO	2023-12-22
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LMJNX44SMJM25JZO7XWHDQCOB4SNJPIE	2023-12-22
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXR6PIVY4SWO7HDT4EY733H4X32SCPM4	2023-12-22
https://www.debian.org/security/2023/dsa-5495	2023-12-22
https://access.redhat.com/security/cve/CVE-2023-38802	2023-10-05
https://bugzilla.redhat.com/show_bug.cgi?id=2230983	2023-10-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Frrouting Search vendor "Frrouting"		Frrouting Search vendor "Frrouting" for product "Frrouting"				>= 7.5.1 <= 9.0 Search vendor "Frrouting" for product "Frrouting" and version " >= 7.5.1 <= 9.0"		-		Affected
Pica8 Search vendor "Pica8"		Picos Search vendor "Pica8" for product "Picos"				4.3.3.2 Search vendor "Pica8" for product "Picos" and version "4.3.3.2"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				12.0 Search vendor "Debian" for product "Debian Linux" and version "12.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				37 Search vendor "Fedoraproject" for product "Fedora" and version "37"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				38 Search vendor "Fedoraproject" for product "Fedora" and version "38"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				39 Search vendor "Fedoraproject" for product "Fedora" and version "39"		-		Affected