Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2020-25658

22
FAUCET Score

CVE-2020-25658 describes a Bleichenbacher timing attack vulnerability in python-rsa, affecting various Fedora and Red Hat OpenStack Platform products. This medium-severity flaw (CVSS 5.9) allows an unauthenticated attacker to decrypt portions of RSA-encrypted ciphertext by observing timing differences during the decryption process, requiring high attack complexity. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.1, < 4.7CPE matchmatch criteria
cpe:2.3:a:python-rsa_project:python-rsa:*:*:*:*:*:*:*:*
13.0CPE matchmatch criteria
cpe:2.3:a:redhat:openstack_platform:13.0:*:*:*:*:*:*:*
16.0CPE matchmatch criteria
cpe:2.3:a:redhat:openstack_platform:16.0:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.63%
Probability of exploitation in next 30 days
EPSS Percentile
73.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0163 is in the 50th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

pippatch availablevia ghsa
Product: rsaFixed in: 4.7
redhatpatch availablevia redhat_api
Product: Red Hat Ceph Storage 4.3Fixed in: python-rsa-0:4.8-1.el8cp
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: python-rsa-0:4.5-3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.7Fixed in: python-rsa-0:4.7-1.el8
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: python-rsa
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 13 (Queens)Fixed in: python-rsa
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 16 (Train)Fixed in: python-rsa
redhatend of lifevia redhat_api
Product: Red Hat Quay 3Fixed in: quay

Vendor Advisories (2)

pipGHSA-xrx6-fmxq-rjj2high

Timing attacks in python-rsa

Apr 30, 2021
redhatCVE-2020-25658Moderate

python-rsa: bleichenbacher timing oracle attack against RSA decryption

Nov 9, 2020

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / sybrenstuvel/python-rsa/issues/165
ExploitIssue TrackingThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/2SAF67KDGSOHLVFTRDOHNEAFDRSSYIWA
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/APF364QJ2IYLPDNVFBOEJ24QP2WLVLJP
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/QY4PJWTYSOV7ZEYZVMYIF6XRU73CY6O7