GoogleOSV:BIT-PYTHON-2024-5642BIT-python-2024-5642
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.3 Medium
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
13.2%
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. This results in a buffer over-read when NPN is used (see CVE-2024-5535 for OpenSSL). This vulnerability is of low severity due to NPN being not widely used and specifying an empty list likely being uncommon in-practice (typically a protocol name would be configured).
References
www.openwall.com/lists/oss-security/2024/06/28/4
github.com/python/cpython/commit/39258d3595300bc7b952854c915f63ae2d4b9c3e
github.com/python/cpython/issues/121227
github.com/python/cpython/pull/23014
jbp.io/2024/06/27/cve-2024-5535-openssl-memory-safety.html
mail.python.org/archives/list/[email protected]/thread/PLP2JI3PJY33YG6P5BZYSSNU66HASXBQ/
Related
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
6.3 Medium
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
13.2%