Canonical ksmbd-tools SAMR Null Pointer Dereference Denial-of-Service Vulnerability
May 17th, 2023
Vulnerability Details
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Canonical ksmbd-tools. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of the SAMR_OPNUM_QUERY_SECURITY opcode. The issue results from dereferencing a NULL pointer. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
Additional Details
Fixed in 3.4.8 https://github.com/cifsd-team/ksmbd-tools/releases/tag/3.4.8
Disclosure Timeline
- 2022-07-26 - Vulnerability reported to vendor
- 2023-05-17 - Coordinated public release of advisory
Credit
Arnaud Gatignol, Quentin Minster, Florent Saudel, Guillaume Teissier (@thalium_team)
