Dendrite 0.13.8 SSRF via Unauthenticated Legacy Media Download Endpoint
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.9epss 0.2%
exploitation probability
0.2%top 88% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Dendrite through 0.13.8 contains a server-side request forgery vulnerability that allows unauthenticated attackers to cause the server to open outbound TLS connections to arbitrary hosts and ports by supplying an unvalidated serverName parameter to the legacy media download endpoint. Attackers can exploit distinguishable error response classes and leaked internal IP addresses in error messages to perform blind port scanning and enumerate internal network topology.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N
Affected products
matrix-org · dendritepublic PoCs found — 1
cve_referencegithub.com/geo-chen/oss/blob/main/dendrite.md#finding-2-unauthenticated-ssrf-and-internal-port-scanner-via-legacy-_matrixmediar0downloadunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.