#VU85747 Observable discrepancy in py3-pycryptodome - CVE-2023-52323

Vulnerability identifier: #VU85747

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52323

CWE-ID: CWE-203

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
py3-pycryptodome
Other software / Other software solutions

Vendor: www.pycryptodome.org

Description

The vulnerability allows a remote attacker to perform a side-channel attack.

The vulnerability exists due to observable discrepancy, which allows the side-channel leakage for OAEP decryption. A remote attacker can perform a Manger attack and gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

py3-pycryptodome: 3.0 - 3.19.0

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External links
https://github.com/Legrandin/pycryptodome/releases/tag/v3.19.1

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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.