CVE-2024-5642

2024-06-2700:00:00

ubuntu.com

cpython

sslcontext

vulnerability

openssl

buffer over-read

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

6.9 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.2%

JSON

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).

Notes

Author	Note
	Priority reason: Requires unlikely API usage to be vulnerable.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchpython2.7< anyUNKNOWN
ubuntu20.04noarchpython2.7< anyUNKNOWN
ubuntu22.04noarchpython2.7< anyUNKNOWN
ubuntu14.04noarchpython2.7< anyUNKNOWN
ubuntu16.04noarchpython2.7< anyUNKNOWN
ubuntu22.04noarchpython3.10< anyUNKNOWN
ubuntu22.04noarchpython3.11< anyUNKNOWN
ubuntu23.10noarchpython3.11< anyUNKNOWN
ubuntu23.10noarchpython3.12< anyUNKNOWN
ubuntu24.04noarchpython3.12< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	python2.7	< any	UNKNOWN
ubuntu	20.04	noarch	python2.7	< any	UNKNOWN
ubuntu	22.04	noarch	python2.7	< any	UNKNOWN
ubuntu	14.04	noarch	python2.7	< any	UNKNOWN
ubuntu	16.04	noarch	python2.7	< any	UNKNOWN
ubuntu	22.04	noarch	python3.10	< any	UNKNOWN
ubuntu	22.04	noarch	python3.11	< any	UNKNOWN
ubuntu	23.10	noarch	python3.11	< any	UNKNOWN
ubuntu	23.10	noarch	python3.12	< any	UNKNOWN
ubuntu	24.04	noarch	python3.12	< any	UNKNOWN