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October 2023

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[CVE-2023-5752] Mercurial configuration injectable in repo revision when installing via pip
by Seth Larson Oct. 24, 2023

Oct. 24, 2023

When installing a package from a Mercurial VCS URL (ie "pip install hg+...") with pip prior to v23.3, the specified Mercurial revision could be used to inject arbitrary configuration options to the "hg clone" call (ie "--config"). Controlling the Mercurial configuration can modify how and which repository is installed. This vulnerability does not affect users who aren't installing Mercurial VCS URLs. This is a *MEDIUM* severity vulnerability. *Affected versions:* pip before v23.3 are affected by this vulnerability. *Remediation:* - Upgrade to at least pip v23.3 - Don't clone Mercurial repositories or allow uncontrolled input to the target Mercurial URL and revision. *References:* - https://www.cve.org/CVERecord?id=CVE-2023-5752 - https://github.com/pypa/pip/pull/12306

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