Possible Bitbucket Pre-Auth RCE via git archive exec Null-Byte Injection (CVE-2022-36804) (via webserver)

ATT&CK techniques

Initial Access → Execution

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
- T1059.004Unix Shell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects requests to the Bitbucket archive REST endpoint carrying a null-byte encoded prefix and a git archive exec directive. This maps to CVE-2022-36804 where the prefix parameter is abused to inject arguments into the git archive command. An attacker uses this to spawn a shell and achieve unauthenticated remote command execution on the server.

Reporting behind it

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Possible Bitbucket Pre-Auth RCE via git archive exec Null-Byte Injection (CVE-2022-36804) (via webserver)

Pivot detection · T1059.004 · 9 related

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