CVE-2020-25658
First published: Wed Oct 21 2020(Updated: )
A flaw was found in python-rsa, where it is vulnerable to Bleichenbacher timing attacks. This flaw allows an attacker, via the RSA decryption API, to decrypt parts of the ciphertext encrypted with RSA. The highest threat from this vulnerability is to confidentiality.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/python-rsa | <0:4.8-1.el8c | 0:4.8-1.el8c |
| redhat/python-rsa | <0:4.5-3.el7 | 0:4.5-3.el7 |
| redhat/python-rsa | <0:4.7-1.el8 | 0:4.7-1.el8 |
| pip/rsa | >=2.1<4.7 | 4.7 |
| python3-rfc3339 | >=2.1<4.7 | |
| Red Hat OpenStack Platform | =13.0 | |
| Red Hat OpenStack Platform | =16.0 | |
| Red Hat Fedora | =33 | |
| Red Hat Fedora | =34 | |
| Red Hat Fedora | =35 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-25658 https://nvd.nist.gov/vuln/detail/CVE-2020-25658 https://github.com/sybrenstuvel/python-rsa/issues/165
- https://bugzilla.redhat.com/show_bug.cgi?id=1889972
- https://access.redhat.com/errata/RHSA-2022:1716
- https://access.redhat.com/errata/RHSA-2021:0637
- https://access.redhat.com/errata/RHSA-2020:5634
- https://access.redhat.com/security/cve/cve-2020-25658
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1895780
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1895779
- https://github.com/sybrenstuvel/python-rsa/commit/714324a9a34f0958704e5064251a1f00ed37a372
- https://github.com/sybrenstuvel/python-rsa/issues/165
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-25658
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SAF67KDGSOHLVFTRDOHNEAFDRSSYIWA/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APF364QJ2IYLPDNVFBOEJ24QP2WLVLJP/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QY4PJWTYSOV7ZEYZVMYIF6XRU73CY6O7/
- https://nvd.nist.gov/vuln/detail/CVE-2020-25658
- https://github.com/sybrenstuvel/python-rsa/commit/dae8ce0d85478e16f2368b2341632775313d41ed
- https://access.redhat.com/security/cve/CVE-2020-25658
- https://github.com/advisories/GHSA-xrx6-fmxq-rjj2 (Advisory)
- https://github.com/pypa/advisory-database/tree/main/vulns/rsa/PYSEC-2020-100.yaml
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SAF67KDGSOHLVFTRDOHNEAFDRSSYIWA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APF364QJ2IYLPDNVFBOEJ24QP2WLVLJP
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QY4PJWTYSOV7ZEYZVMYIF6XRU73CY6O7
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2SAF67KDGSOHLVFTRDOHNEAFDRSSYIWA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APF364QJ2IYLPDNVFBOEJ24QP2WLVLJP
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QY4PJWTYSOV7ZEYZVMYIF6XRU73CY6O7
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2020-25658?
The severity of CVE-2020-25658 is high, primarily affecting confidentiality.
How do I fix CVE-2020-25658?
To fix CVE-2020-25658, upgrade python-rsa to version 4.8 or later.
Which versions of python-rsa are affected by CVE-2020-25658?
CVE-2020-25658 affects python-rsa versions prior to 4.8, including versions 4.7 and below.
What type of attack does CVE-2020-25658 enable?
CVE-2020-25658 enables Bleichenbacher timing attacks which can decrypt parts of RSA encrypted ciphertext.
Is CVE-2020-25658 specific to certain platforms?
CVE-2020-25658 affects python-rsa across various platforms including Red Hat OpenStack and Fedora.
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