Vulnerability in Python Software Foundation Cpython
CVE-2024-4030
On Windows a directory returned by tempfile.mkdtemp() would not always have permissions set to restrict reading and writing to the temporary directory by other users, instead usually inheriting the correct permissions from the default location. Alternate configurations or users without a profile directory may not have the intended permissions. If you’re not using Windows or haven’t changed the temporary directory location then you aren’t affected by this vulnerability. On other platforms the returned directory is consistently readable and writable only by the current user. This issue was caused by Python not supporting Unix permissions on Windows. The fix adds support for Unix “700” for the mkdir function on Windows which is used by mkdtemp() to ensure the newly created directory has the proper permissions.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 20.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Python Software Foundation Cpython — versions 0, 3.9.0, 3.10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- mail.python.org/archives/list/security-announce@python.org/thread/PRGS5OR3N3PNP… (vendor-advisory)
- github.com/python/cpython/issues/118486 (issue-tracking)
- github.com/python/cpython/commit/81939dad77001556c527485d31a2d0f4a759033e (patch)
- github.com/python/cpython/commit/8ed546679524140d8282175411fd141fe7df070d (patch)
- github.com/python/cpython/commit/35c799d79177b962ddace2fa068101465570a29a (patch)
- github.com/python/cpython/commit/5130731c9e779b97d00a24f54cdce73ce9975dfd (patch)
- github.com/python/cpython/commit/66f8bb76a15e64a1bb7688b177ed29e26230fdee (patch)
- github.com/python/cpython/commit/6d0850c4c8188035643586ab4d8ec2468abd699e (patch)
- github.com/python/cpython/commit/91e3669e01245185569d09e9e6e11641282971ee (patch)
- github.com/python/cpython/commit/94591dca510c796c7d40e9b4167ea56f2fdf28ca (patch)
Frequently asked questions
- What is CVE-2024-4030?
- CVE-2024-4030 is a high-severity vulnerability in Python Software Foundation Cpython, classified under Incorrect Default Permissions. CVSS score: 7.1/10. Published 2024-05-07.
- How severe is CVE-2024-4030?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2024-4030 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.