CVE-2024-3219 — The “socket” module provides a pure-Python fallback to the socket

The “socket” module provides a pure-Python fallback to the socket.socketpair() function for platforms that don’t support AF_UNIX, such as Windows. This pure-Python implementation uses AF_INET or AF_INET6 to create a local connected pair of sockets. The connection between the two

01What is this vulnerability?

The “socket” module provides a pure-Python fallback to the socket.socketpair() function for platforms that don’t support AF_UNIX, such as Windows. This pure-Python implementation uses AF_INET or AF_INET6 to create a local connected pair of sockets. The connection between the two sockets was not verified before passing the two sockets back to the user, which leaves the server socket vulnerable to…

02Affected products

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-07-29T21:54:05.830Z
• Last modified: 2025-05-02T23:02:58.327Z

09References

• github.com — https://github.com/python/cpython/pull/122134
• github.com — https://github.com/python/cpython/issues/122133
• mail.python.org — https://mail.python.org/archives/list/[email protected]/thread/WYKDQW…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2024/07/29/3
• github.com — https://github.com/python/cpython/commit/06fa244666ec6335a3b9bf2367e31b42b9a89b2…
• github.com — https://github.com/python/cpython/commit/0b65c8bf5367625673eafb92f85046a1b31259f…
• github.com — https://github.com/python/cpython/commit/220e31adeaaa8436c9ff234cba1398bc49e2bb6…
• github.com — https://github.com/python/cpython/commit/5f90abaa786f994db3907fc31e2ee00ea2cf092…
• github.com — https://github.com/python/cpython/commit/b252317956b7fc035bb3774ef6a177e227f9fc5…
• github.com — https://github.com/python/cpython/commit/2621a8a40ba4b2c68ca564671b7daa5da80a450…
• github.com — https://github.com/python/cpython/commit/5df322e91a40909e6904bbdbc0c3a6b6a9eead3…
• github.com — https://github.com/python/cpython/commit/c21a36112a0028d7ac3cf8f480e0dc88dba5922…
• github.com — https://github.com/python/cpython/commit/f071f01b7b7e19d7d6b3a4b0ec62f820ecb1466…
• github.com — https://github.com/python/cpython/commit/31302f5fc24eecd693f0c8aaba7c2840b09b594…
• github.com — https://github.com/python/cpython/commit/3f5d9d12c74787fbf3f5891835c85cc15526c86…
• github.com — https://github.com/python/cpython/commit/c5655aa6ad120d2ed7f255bebd6e8b71a9c07dd…
• github.com — https://github.com/python/cpython/commit/e319f774f9e766a2b92949444a2d46081df3363…
• github.com — https://github.com/python/cpython/commit/78df1043dbdce5c989600616f9f87b4ee72944e…