Canonical ksmbd-tools LSARPC Heap-based Buffer Overflow Remote Code Execution Vulnerability
May 17th, 2023
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Canonical ksmbd-tools. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of the LSARPC_OPNUM_LOOKUP_SID2 opcode. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.
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)
