An issue was discovered in janus-gateway (aka Janus WebRTC Server) through 0.10.0. janus_sdp_preparse in sdp.c has a NULL pointer dereference.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Janus | Meetecho | 0.9.0 (including) | 0.10.0 (including) |
| Janus | Ubuntu | bionic | * |
| Janus | Ubuntu | eoan | * |
| Janus | Ubuntu | esm-apps/bionic | * |
| Janus | Ubuntu | esm-apps/focal | * |
| Janus | Ubuntu | focal | * |
| Janus | Ubuntu | groovy | * |
| Janus | Ubuntu | hirsute | * |
| Janus | Ubuntu | impish | * |
| Janus | Ubuntu | kinetic | * |
| Janus | Ubuntu | lunar | * |
| Janus | Ubuntu | mantic | * |
| Janus | Ubuntu | trusty | * |
Potential Mitigations
References
- https://github.com/meetecho/janus-gateway/blob/v0.10.0/sdp.c#L64
- https://github.com/meetecho/janus-gateway/blob/v0.10.0/sdp.c#L74
- https://github.com/meetecho/janus-gateway/pull/2214
- https://github.com/merrychap/poc_exploits/tree/master/janus-webrtc/CVE-2020-13900
- https://github.com/meetecho/janus-gateway/blob/v0.10.0/sdp.c#L64
- https://github.com/meetecho/janus-gateway/blob/v0.10.0/sdp.c#L74
- https://github.com/meetecho/janus-gateway/pull/2214
- https://github.com/merrychap/poc_exploits/tree/master/janus-webrtc/CVE-2020-13900