CVE-2020-25657 — Vulnetix

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CVE-2020-25657 PUBLISHED

A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality.

EPSS 0.41% · 60.9th percentile

Risk Scores

EPSS Score

0.41%

60.9th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:25.10	m2crypto	0.42.0-2.1build1, 0, 0.42.0-3
Ubuntu:22.04:LTS	m2crypto	0, 0.38.0-1ubuntu3, 0.38.0-1ubuntu5
Ubuntu:14.04:LTS	m2crypto	0, 0.21.1-3ubuntu3, 0.21.1-3ubuntu4
Ubuntu:16.04:LTS	m2crypto	0, 0.21.1-3ubuntu5, 0.22.6~rc4-1ubuntu1
Ubuntu:20.04:LTS	m2crypto	0.31.0-9ubuntu1, 0, 0.31.0-6build1
Ubuntu:18.04:LTS	m2crypto	0, 0.27.0-4build1, 0.27.0-4
Ubuntu:24.04:LTS	m2crypto	0.40.1-0ubuntu1, 0.40.1-1, 0.40.1-2build1

Timeline

Jan 12, 2021 CVE Published
Apr 14, 2021 EPSS Score
Jun 22, 2021 EPSS Score
Aug 23, 2021 EPSS Score
Dec 25, 2021 EPSS Score
Jan 6, 2022 EPSS Score
Feb 4, 2022 EPSS Score
Feb 25, 2022 EPSS Score
Apr 1, 2022 EPSS Score
Jun 29, 2022 EPSS Score
Aug 31, 2022 EPSS Score
Nov 1, 2022 EPSS Score

References

https://ubuntu.com/security/CVE-2020-25657 third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1889823 third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2020-25657 third-party-advisory

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