Bug 1889972 (CVE-2020-25658)
| Summary: | CVE-2020-25658 python-rsa: bleichenbacher timing oracle attack against RSA decryption | ||
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| Product: | [Other] Security Response | Reporter: | Huzaifa S. Sidhpurwala <huzaifas> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | amctagga, apevec, bdettelb, bmontgom, bperkins, dbecker, dramseur, eparis, hkario, hvyas, jburrell, jhunter, jjoyce, jmontleo, jokerman, jschluet, jshepherd, kmitts, kmullins, lhh, lpeer, mburns, me, mgala, mjudeiki, nstielau, rhel8-maint, rhos-maint, sclewis, security-response-team, slinaber, sponnaga, tomckay, yohangraterol92 |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| See Also: | https://issues.redhat.com/browse/PROJQUAY-1296 | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
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.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-02-24 19:02:04 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1895779, 1895780, 1897967, 1897968, 1898967, 1899504, 1902905, 1910656 | ||
| Bug Blocks: | 1889973 | ||
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Description
Huzaifa S. Sidhpurwala
2020-10-21 06:44:47 UTC
Created python-rsa tracking bugs for this issue: Affects: epel-all [bug 1895780] Affects: fedora-all [bug 1895779] Fix doc text: the vulnerability *is* present, it is *not* fixed—there are no patches proposed to fix it. I haven't looked at the old code, but I don't expect any old versions to be secure, the issue at least partially stems from the fact that the API raises an exception in case of malformed plaintext, so all versions that can raise an exception in decryption API are vulnerable. It looks like all versions since 2.1 (inclusive) are vulnerable, versions before 2.1 don't provide RSA decryption API: https://github.com/sybrenstuvel/python-rsa/commit/714324a9a34f0958704e5064251a1f00ed37a372 . Statement: In Red Hat OpenStack Platform, because the flaw has a lower impact and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP python-rsa package. External References: https://github.com/sybrenstuvel/python-rsa/issues/165 Acknowledgments: Name: Hubert Kario (Red Hat) This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.7 Via RHSA-2020:5634 https://access.redhat.com/errata/RHSA-2020:5634 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-25658 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 3.11 Via RHSA-2021:0637 https://access.redhat.com/errata/RHSA-2021:0637 This issue has been addressed in the following products: Red Hat Ceph Storage 4.3 Via RHSA-2022:1716 https://access.redhat.com/errata/RHSA-2022:1716 |