Vulnerability CVE-2020-25657
Published: 2021-01-12

Description:
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.

Type:

CWE-385

 (Covert Timing Channel)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
M2crypto project -> M2crypto 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=1889823
https://bugzilla.redhat.com/show_bug.cgi?id=1889823,https://gitlab.com/m2crypto/m2crypto/-/issues/285
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