Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

fortra/impacket

              master @ 9a5621d
            

Fixes

CVEs

CRITICAL

Peak severity

50.0%

Coverage

Highlights

Auth Bypass: 4 prior fixes. Scrutinize any change in this area.

impacket/smbserver.py: most-fixed (3 issues). Treat as high-risk during review.

3 high-severity fixes in this history; regressions here are high-impact.

Recurring patterns

The bug types that recur here, drawn from past fixes, not open vulnerabilities.

Auth Bypass: Attackers can bypass LDAP signing and Channel Binding Verification (EPA) during NTLM relay attacks by stripping critical NTLM negotiate flags (NTLMSSP_NEGOTIATE_SEAL, NTLMSSP_NEGOTIATE_SIGN, NTLMSSP_NEGOTIATE_ALWAYS_SIGN).

Path Traversal: Flawed conditional logic in SMB server directory commands allowed directory traversal checks to be bypassed, enabling arbitrary directory deletion (CVE-2021-31800).

Auth Bypass: Lack of native SSL Channel Binding Tokens (CBT) using tls-unique allowed NTLM credential relay attacks against target MSSQL services.