Vulnerability identifier: #VU77059
Vulnerability risk: Medium
CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-918
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Synapse
Server applications /
Conferencing, Collaboration and VoIP solutions
Vendor: Matrix.org
Description
The disclosed vulnerability allows a remote attacker to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input within the oEmbed and image URLs. A remote attacker can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Synapse: 1.0.0 - 1.84.1
External links
http://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc
http://github.com/matrix-org/synapse/pull/15601
http://github.com/matrix-org/synapse/releases/tag/v1.85.0
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.