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.

An update of the gobgp package has been released.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2025-43973)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2025-43973)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7661-1 advisory.

    It was discovered that GoBGP did not properly manage memory under certain circumstances, which could lead     to a buffer overflow. An attacker could possibly use this issue to cause a denial of service. This issue     was only addressed in Ubuntu 22.04 LTS and Ubuntu 20.04 LTS. (CVE-2023-46565)

    It was discovered that GoBGP did not properly verify the length of certain inputs. An attacker could     possibly use this issue to cause a panic resulting in a denial of service. (CVE-2025-43970,     CVE-2025-43971, CVE-2025-43972, CVE-2025-43973)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
333631	Photon OS 5.0: Gobgp PHSA-2025-5.0-91-0548	Nessus	PhotonOS Local Security Checks	Local	critical
434664	SCA: security update for github.com/osrg/gobgp/v3 (GHSA-c5jg-wr5v-2wp2)	Tenable Cloud Security	SCA Checks	Local	critical
434664	SCA: security update for github.com/osrg/gobgp/v3 (GHSA-c5jg-wr5v-2wp2)	Tenable Self-Hosted Container Security	SCA Checks	Local	critical
246273	Linux Distros Unpatched Vulnerability : CVE-2025-43973	Nessus	Misc.	Local	critical
242574	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : GoBGP vulnerabilities (USN-7661-1)	Nessus	Ubuntu Local Security Checks	Local	high
241344	Photon OS 5.0: Gobgp PHSA-2025-5.0-0548	Nessus	PhotonOS Local Security Checks	Local	critical
241159	Photon OS 4.0: Gobgp PHSA-2025-4.0-0807	Nessus	PhotonOS Local Security Checks	Local	critical

Detections

Analytics

CVE-2025-43973

critical

Tenable Plugins

critical

critical

critical

critical

high

critical

critical