Arbitrary Code Execution in Phabricator via Mercurial Branch Name

CVE-2017-17536 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:P/A:P

Phabricator before 2017-11-10 does not block the --config and --debugger flags to the Mercurial hg program, which allows remote attackers to execute arbitrary code by using the web UI to browse a branch whose name begins with a --config= or --debugger= substring.

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