Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 & CVE-2024-0450)

                							

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Security fixes in Python 3.10.14, 3.9.19, and 3.8.19 (CVE-2023-6597 &amp; CVE-2024-0450)

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From: Alan Coopersmith &lt;alan.coopersmith () oracle com&gt;

Date: Wed, 20 Mar 2024 16:35:37 -0700

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https://discuss.python.org/t/python-3-10-14-3-9-19-and-3-8-19-is-now-available/48993
announces the availability of Python 3.10.14, 3.9.19, and 3.8.19,
including these security fixes (see above URL for links to details on each):

- gh-115399 &amp; gh-115398: bundled libexpat was updated to 2.6.0 to address
  CVE-2023-52425, and control of the new reparse deferral functionality was
  exposed with new APIs. Thanks to Sebastian Pipping, the maintainer of
  libexpat, who worked with us directly on incorporating those fixes!

- gh-109858 : zipfile is now protected from the “quoted-overlap” zipbomb to
  address CVE-2024-0450 . It now raises BadZipFile when attempting to read an
  entry that overlaps with another entry or central directory

- gh-91133: tempfile.TemporaryDirectory cleanup no longer dereferences symlinks
  when working around file system permission errors to address CVE-2023-6597

- gh-115197: urllib.request no longer resolves the hostname before checking it
  against the system’s proxy bypass list on macOS and Windows

- gh-81194: a crash in socket.if_indextoname() with a specific value (UINT_MAX)
  was fixed. Relatedly, an integer overflow in socket.if_indextoname() on 64-bit
  non-Windows platforms was fixed

- gh-113659: .pth files with names starting with a dot or containing the hidden
  file attribute are now skipped

- gh-102388: iso2022_jp_3 and iso2022_jp_2004 codecs no longer read out of
  bounds

- gh-114572 : ssl.SSLContext.cert_store_stats() and
  ssl.SSLContext.get_ca_certs() now correctly lock access to the certificate
  store, when the ssl.SSLContext is shared across multiple threads

Presumably releases for 3.11 &amp; 3.12 will follow as the announcements of the
two new CVEs listed them as also affected.

https://mail.python.org/archives/list/security-announce () python org/thread/XELNUX2L3IOHBTFU7RQHCY6OUVEWZ2FG/
said:

  [CVE-2024-0450] Quoted zip-bomb protection for zipfile

  An issue was found in the CPython `zipfile` module affecting versions
  3.12.2, 3.11.8, 3.10.13, 3.9.18, and 3.8.18 and prior.

  The zipfile module is vulnerable to “quoted-overlap” zip-bombs which exploit
  the zip format to create a zip-bomb with a high compression ratio. The fixed
  versions of CPython makes the zipfile module reject zip archives which overlap
  entries in the archive.

  *References*
  * CVE: https://www.cve.org/CVERecord?id=CVE-2024-0450
  * Patch: https://github.com/python/cpython/pull/110016
  * Issue: https://github.com/python/cpython/issues/109858

https://mail.python.org/archives/list/security-announce () python org/thread/Q5C6ATFC67K53XFV4KE45325S7NS62LD/
said:

  [CVE-2023-6597] tempfile.TemporaryDirectory dereferences symlinks during cleanup

  An issue was found in the CPython `tempfile.TemporaryDirectory` class
  affecting versions 3.12.2, 3.11.8, 3.10.13, 3.9.18, and 3.8.18 and prior.

  The tempfile.TemporaryDirectory class would dereference symlinks during
  cleanup of permissions-related errors. This means users which can run
  privileged programs are potentially able to modify permissions of files
  referenced by symlinks in some circumstances.

  *References*
  * CVE: https://www.cve.org/CVERecord?id=CVE-2023-6597
  * Patch: https://github.com/python/cpython/pull/99930
  * Issue: https://github.com/python/cpython/issues/91133

--
        -Alan Coopersmith-                 alan.coopersmith () oracle com
         Oracle Solaris Engineering - https://blogs.oracle.com/solaris

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