Improper Certificate Validation in Matrix Sydent



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-38686
CWE-ID CWE-295
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 Sydent
Server applications / Directory software, identity management

Vendor Matrix.org

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Certificate Validation

EUVDB-ID: #VU78843

Risk: Medium

CVSSv4.0: 6.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-38686

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper validation of email server certificates. A remote attacker on the local network can perform a man-in-the-middle (MitM) attack to intercept room invitations and address confirmation emails.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Sydent: 1.0.0 - 2.5.5

CPE2.3 External links

https://github.com/matrix-org/sydent/releases/tag/v2.5.6
https://github.com/matrix-org/sydent/security/advisories/GHSA-p6hw-wm59-3g5g


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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