Multiple vulnerabilities in Matrix Synapse



Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2021-39164
CVE-2021-39163
CWE-ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Synapse
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor Matrix.org

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU56225

Risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-39164

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote authenticated attacker can gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Synapse: 0.0.0 - 2.20.15.1104

CPE2.3 External links

https://github.com/matrix-org/synapse/security/advisories/GHSA-3x4c-pq33-4w3q
https://github.com/matrix-org/synapse/releases/tag/v1.41.1
https://github.com/matrix-org/synapse/commit/cb35df940a


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Information disclosure

EUVDB-ID: #VU56226

Risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-39163

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote authenticated attacker can access the name, avatar, topic and number of members of a room if they know the ID of the room.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Synapse: 0.0.0 - 2.20.15.1104

CPE2.3 External links

https://github.com/matrix-org/synapse/security/advisories/GHSA-jj53-8fmw-f2w2
https://github.com/matrix-org/synapse/releases/tag/v1.41.1
https://github.com/matrix-org/synapse/commit/cb35df940a


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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



###SIDEBAR###