Nixpkgs security tracker
7.5 HIGH
- CVSS version: 3.1
- Attack vector (AV): NETWORK
- Attack complexity (AC): LOW
- Privileges required (PR): NONE
- User interaction (UI): NONE
- Scope (S): UNCHANGED
- Confidentiality impact (C): NONE
- Integrity impact (I): NONE
- Availability impact (A): HIGH
Suricata DCERPC: unbounded fragment buffering leads to memory exhaustion
Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, crafted DCERPC traffic can cause Suricata to expand a buffer w/o limits, leading to memory exhaustion and the process getting killed. While reported for DCERPC over UDP, it is believed that DCERPC over TCP and SMB are also vulnerable. DCERPC/TCP in the default configuration should not be vulnerable as the default stream depth is limited to 1MiB. Versions 8.0.3 and 7.0.14 contain a patch. Some workarounds are available. For DCERPC/UDP, disable the parser. For DCERPC/TCP, the `stream.reassembly.depth` setting will limit the amount of data that can be buffered. For DCERPC/SMB, the `stream.reassembly.depth` can be used as well, but is set to unlimited by default. Imposing a limit here may lead to loss of visibility in SMB.
References
-
https://github.com/OISF/suricata/security/advisories/GHSA-289c-h599-3xcx x_refsource_CONFIRM
-
https://redmine.openinfosecfoundation.org/issues/8182 x_refsource_MISC
Affected products
- ==< 7.0.14
- ==>= 8.0.0, < 8.0.3
Package maintainers
-
@magenbluten magenbluten <magenbluten@codemonkey.cc>