Multiple vulnerabilities in Matrix Synapse
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2023-32683 CVE-2023-32682 |
| CWE-ID | CWE-918 CWE-284 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Synapse Server applications / Conferencing, Collaboration and VoIP solutions |
| Vendor | Matrix.org |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Server-Side Request Forgery (SSRF)
EUVDB-ID: #VU77059
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: CVE-2023-32683
CWE-ID:
CWE-918 - Server-Side Request Forgery (SSRF)
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSynapse: 1.0.0 - 1.84.1
External linkshttp://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
Q & A
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.
2) Improper access control
EUVDB-ID: #VU77060
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-32682
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper checks for deactivated users during login. A remote user can login when using uncommon configurations.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSynapse: 1.0.0 - 1.84.1
External linkshttp://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p
http://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#password_config
http://github.com/matrix-org/synapse/pull/15624
http://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#create-or-modify-account
http://matrix-org.github.io/synapse/latest/jwt.html
http://github.com/matrix-org/synapse/pull/15634
http://github.com/matrix-org/synapse/releases/tag/v1.85.0
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.
