Server-Side Request Forgery (SSRF) in Synapse - CVE-2023-32683
Published: June 7, 2023 / Updated: June 8, 2023
Vulnerability identifier: #VU77059
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]
CVE-ID: CVE-2023-32683
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Synapse
Fedora
matrix-synapse
Fedora
matrix-synapse
How to mitigate CVE-2023-32683
Install updates from vendor's website.
Synapse - update to 1.85.0
matrix-synapse - addressed in versions 1.85.0-1.fc38, 1.85.1-1.fc38, 1.85.2-1.fc38
matrix-synapse - addressed in versions 1.85.0-1.fc38, 1.85.1-1.fc38, 1.85.2-1.fc38