GHSA-c5jg-wr5v-2wp2 — medium GitHub Advisory (CVE-2025-43973) in go/github.com/osrg/gobgp

Description

An issue was discovered in GoBGP before 3.35.0. pkg/packet/rtr/rtr.go does not verify that the input length corresponds to a situation in which all bytes are available for an RTR message.

Basic information

Type: reviewed
Severity: medium
Advisory on GitHub: Open advisory ↗
Repository advisory: —
Source code: Browse source ↗
Published (advisory): 2025-04-21 03:30:19 UTC
Updated: 2025-04-21 21:55:39 UTC
GitHub reviewed: 2025-04-21 21:55:39 UTC
NVD published: 2025-04-20

Score	Percentile
0.11%	29.16%

CVSS Scores

Base score	Version	Severity	Vector
6.8	3.1	—	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type	Value
GHSA	GHSA-c5jg-wr5v-2wp2 ↗
CVE	CVE-2025-43973 ↗

CWEs

CWE id	Name
CWE-193	Off-by-one Error

Affected packages (2)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
go	github.com/osrg/gobgp	< 3.35.0	—	—
go	github.com/osrg/gobgp/v3	< 3.35.0	3.35.0	—

GoBGP does not verify that the input length