FreeBSD : ca_root_nss -- trusted root certificate from compromised CA eMudhra (b755b277-cf12-11f1-bae2-3497f65b111b)

high Nessus Plugin ID 371699

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the b755b277-cf12-11f1-bae2-3497f65b111b advisory.

eMudhra generated several of its TLS intermediate CA certificates with trivially small private keys, which have since been recovered and publicly disclosed. Those intermediates are signed by the emSign ECC Root CA - G3 root certificate, which this port installs as part of its trusted bundle up to and including version 3.131.
NSS 3.131.1 removes the root certificate.
The intermediates have been revoked, but OpenSSL does not check certificate revocation by default.
FreeBSD-SA-26:73.caroot addresses the base system trust store by marking the root certificate as untrusted. That only affects the store generated by certctl(8), never the bundle installed by this port. On FreeBSD 14 the port owns /etc/ssl/cert.pem by default, and software reading the bundle directly, such as programs built with Go or Rust, uses /usr/local/etc/ssl/cert.pem or /usr/local/share/certs on every version of FreeBSD. Such configurations keep trusting the root certificate until the package is updated.
An attacker able to intercept network traffic can use the compromised keys to issue a certificate that impersonates any TLS server, allowing the traffic to be read or modified without detection.

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

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

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 371699

File Name: freebsd_pkg_b755b277cf1211f1bae23497f65b111b.nasl

Version: 1.1

Type: Local

Family: FreeBSD Local Security Checks

Published: 10/24/2026

Updated: 10/24/2026

Supported Sensors: Nessus

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:ca_root_nss

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 10/23/2026

Vulnerability Publication Date: 10/21/2026

Detections

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