| Name | CVE-2020-25657 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 975002 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| m2crypto (PTS) | buster | 0.31.0-4+deb10u2 | vulnerable |
| bullseye | 0.37.1-2 | vulnerable |
| bookworm | 0.38.0-4 | fixed |
| trixie | 0.40.1-1 | fixed |
| sid | 0.40.1-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| m2crypto | source | (unstable) | 0.38.0-4 | | | 975002 |
Notes
[bullseye] - m2crypto <no-dsa> (Minor issue)
[buster] - m2crypto <no-dsa> (Minor issue)
[stretch] - m2crypto <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=1889823
https://gitlab.com/m2crypto/m2crypto/-/issues/285
https://gitlab.com/m2crypto/m2crypto/-/issues/282 (restricted)
https://gitlab.com/m2crypto/m2crypto/-/commit/84c53958def0f510e92119fca14d74f94215827a