Ubuntu update for python-cryptography

1) Observable discrepancy

EUVDB-ID: #VU88199

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-50782

CWE-ID: CWE-203 - Observable discrepancy

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote attacker can decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Mitigation

Update the affected package python-cryptography to the latest version.

Vulnerable software versions

Ubuntu: 16.04

python-cryptography (Ubuntu package): before Ubuntu Pro

python3-cryptography (Ubuntu package): before Ubuntu Pro

External links

http://ubuntu.com/security/notices/USN-6673-2

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.