Home/CVE/A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the
CVE

CVE-2020-25657

A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the

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.

MEDIUM · CVSS 5.9 EPSS 0.00307
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-385Covert Timing Channel
▤

Affected Products & Versions

4
m2crypto project m2cryptoall versions
redhat virtualizationall versions
redhat enterprise linuxall versions
fedoraproject fedoraall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPowershell Detect Virtualization Environment
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Jan 2021 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

11
suse-csafsuse-ru-2025_0796-1
suse-csafsuse-ru-2025_0800-1
suse-csafopenSUSE-SU-2024:12192-1
suse-csafsuse-fu-2024_1448-1
suse-csafSUSE-SU-2022:2691-1
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1889823Issue TrackingThird Party Advisory
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