Detections
Analytics

SCA: security update for matrix-sydent (GHSA-9jhm-8m8c-c3f4)

medium Tenable Self-Hosted Container Security Plugin ID 413334

Description

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

 - Sydent is a reference Matrix identity server. Sydent can be induced to send HTTP GET requests to internal
 systems, due to lack of parameter validation or IP address blacklisting. It is not possible to exfiltrate
 data or control request headers, but it might be possible to use the attack to perform an internal port
 enumeration. This issue has been addressed in in 9e57334, 8936925, 3d531ed, 0f00412. A potential
 workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.
 (CVE-2021-29431)

See Also

https://github.com/advisories/GHSA-9jhm-8m8c-c3f4

Plugin Details

Severity: Medium

ID: 413334

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N

CVSS Score Source: CVE-2021-29431

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 2.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/19/2021

Vulnerability Publication Date: 4/15/2021

Reference Information

CVE: CVE-2021-29431