REDHAT-BUG-2276525
First published: Mon Apr 22 2024(Updated: )
An issue was found in the CPython `zipfile` module affecting versions 3.12.1, 3.11.7, 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. <a href="https://github.com/python/cpython/commit/30fe5d853b56138dbec62432d370a1f99409fc85">https://github.com/python/cpython/commit/30fe5d853b56138dbec62432d370a1f99409fc85</a> <a href="https://github.com/python/cpython/commit/66363b9a7b9fe7c99eba3a185b74c5fdbf842eba">https://github.com/python/cpython/commit/66363b9a7b9fe7c99eba3a185b74c5fdbf842eba</a> <a href="https://github.com/python/cpython/commit/a2c59992e9e8d35baba9695eb186ad6c6ff85c51">https://github.com/python/cpython/commit/a2c59992e9e8d35baba9695eb186ad6c6ff85c51</a> <a href="https://github.com/python/cpython/commit/a956e510f6336d5ae111ba429a61c3ade30a7549">https://github.com/python/cpython/commit/a956e510f6336d5ae111ba429a61c3ade30a7549</a> <a href="https://github.com/python/cpython/commit/d05bac0b74153beb541b88b4fca33bf053990183">https://github.com/python/cpython/commit/d05bac0b74153beb541b88b4fca33bf053990183</a> <a href="https://github.com/python/cpython/commit/fa181fcf2156f703347b03a3b1966ce47be8ab3b">https://github.com/python/cpython/commit/fa181fcf2156f703347b03a3b1966ce47be8ab3b</a> <a href="https://github.com/python/cpython/issues/109858">https://github.com/python/cpython/issues/109858</a> <a href="https://lists.debian.org/debian-lts-announce/2024/03/msg00024.html">https://lists.debian.org/debian-lts-announce/2024/03/msg00024.html</a> <a href="https://lists.debian.org/debian-lts-announce/2024/03/msg00025.html">https://lists.debian.org/debian-lts-announce/2024/03/msg00025.html</a> <a href="https://mail.python.org/archives/list/security-announce@python.org/thread/XELNUX2L3IOHBTFU7RQHCY6OUVEWZ2FG/">https://mail.python.org/archives/list/security-announce@python.org/thread/XELNUX2L3IOHBTFU7RQHCY6OUVEWZ2FG/</a> <a href="https://www.bamsoftware.com/hacks/zipbomb/">https://www.bamsoftware.com/hacks/zipbomb/</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| CPython | >=3.8.0<3.12.1 |
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Reference Links
- https://github.com/python/cpython/commit/30fe5d853b56138dbec62432d370a1f99409fc85
- https://github.com/python/cpython/commit/66363b9a7b9fe7c99eba3a185b74c5fdbf842eba
- https://github.com/python/cpython/commit/a2c59992e9e8d35baba9695eb186ad6c6ff85c51
- https://github.com/python/cpython/commit/a956e510f6336d5ae111ba429a61c3ade30a7549
- https://github.com/python/cpython/commit/d05bac0b74153beb541b88b4fca33bf053990183
- https://github.com/python/cpython/commit/fa181fcf2156f703347b03a3b1966ce47be8ab3b
- https://github.com/python/cpython/issues/109858
- https://lists.debian.org/debian-lts-announce/2024/03/msg00024.html
- https://lists.debian.org/debian-lts-announce/2024/03/msg00025.html
- https://mail.python.org/archives/list/security-announce@python.org/thread/XELNUX2L3IOHBTFU7RQHCY6OUVEWZ2FG/
- https://www.bamsoftware.com/hacks/zipbomb/
- https://access.redhat.com/errata/RHSA-2024:3347
- https://access.redhat.com/errata/RHSA-2024:3391
- https://access.redhat.com/errata/RHSA-2024:3466
- https://access.redhat.com/errata/RHSA-2024:4058
- https://access.redhat.com/errata/RHSA-2024:4078
- https://access.redhat.com/errata/RHSA-2024:4243
- https://access.redhat.com/errata/RHSA-2024:4406
- https://access.redhat.com/errata/RHSA-2024:4865
- https://access.redhat.com/errata/RHSA-2024:4871
- https://access.redhat.com/errata/RHSA-2024:9190
- https://access.redhat.com/errata/RHSA-2024:9192
- https://bugzilla.redhat.com/show_bug.cgi?id=2276525
Frequently Asked Questions
What is the severity of REDHAT-BUG-2276525?
The severity of REDHAT-BUG-2276525 is classified as high due to the potential for exploitation through zip-bomb attacks.
How do I fix REDHAT-BUG-2276525?
To fix REDHAT-BUG-2276525, upgrade to CPython versions 3.12.2 or later, 3.11.8 or later, 3.10.14 or later, 3.9.19 or later, or 3.8.19 or later.
Which versions of CPython are affected by REDHAT-BUG-2276525?
CPython versions 3.12.1, 3.11.7, 3.10.13, 3.9.18, and 3.8.18 and prior are affected by REDHAT-BUG-2276525.
What types of attacks does REDHAT-BUG-2276525 enable?
REDHAT-BUG-2276525 enables 'quoted-overlap' zip-bomb attacks that exploit zip file formats to perform denial of service.
Is there a workaround for REDHAT-BUG-2276525?
The best course of action for REDHAT-BUG-2276525 is to update to a patched version as there are no effective workarounds.
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