#VU97633 Out-of-bounds read in Python - CVE-2024-5642
Published: September 20, 2024
Vulnerability identifier: #VU97633
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2024-5642
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Python
Python
Software vendor:
Python.org
Python.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to CPython 3.9 and earlier doesn't disallow configuring an empty list ("[]") for SSLContext.set_npn_protocols() which is an invalid value for the underlying OpenSSL API when NPN is used. A remote attacker can trigger an out-of-bounds read error and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.
External links
- https://jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html
- https://github.com/python/cpython/pull/23014
- https://mail.python.org/archives/list/security-announce@python.org/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/
- https://github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e
- http://www.openwall.com/lists/oss-security/2024/06/28/4
- https://github.com/python/cpython/issues/121227
- https://security.netapp.com/advisory/ntap-20240726-0005/
- https://github.com/advisories/GHSA-hrvr-7x5w-xpmq