RHSA-2021:1608: Moderate: python-cryptography security, bug fix, and enhancement update
First published: Tue May 18 2021(Updated: )
The python-cryptography packages contain a Python Cryptographic Authority's (PyCA's) cryptography library, which provides cryptographic primitives and recipes to Python developers.<br>The following packages have been upgraded to a later upstream version: python-cryptography (3.2.1). (BZ#1873581, BZ#1891947)<br>Security Fix(es):<br><li> python-cryptography: bleichenbacher timing oracle attack against RSA decryption (CVE-2020-25659)</li> <li> python-cryptography: certain sequences of update() calls when symmetrically encrypting very large payloads could result in an integer overflow and lead to buffer overflows (CVE-2020-36242)</li> For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.<br>Additional Changes:<br>For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/python-cryptography | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python-cryptography-debugsource | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python3-cryptography | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python3-cryptography-debuginfo | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python-cryptography-debugsource | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python3-cryptography | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python3-cryptography-debuginfo | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python-cryptography-debugsource | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python3-cryptography | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python3-cryptography-debuginfo | <3.2.1-4.el8 | 3.2.1-4.el8 |
| redhat/python-cryptography-debugsource | <3.2.1-4.el8.aa | 3.2.1-4.el8.aa |
| redhat/python3-cryptography | <3.2.1-4.el8.aa | 3.2.1-4.el8.aa |
| redhat/python3-cryptography-debuginfo | <3.2.1-4.el8.aa | 3.2.1-4.el8.aa |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1778939
- https://bugzilla.redhat.com/show_bug.cgi?id=1873581
- https://bugzilla.redhat.com/show_bug.cgi?id=1889988
- https://bugzilla.redhat.com/show_bug.cgi?id=1891947
- https://bugzilla.redhat.com/show_bug.cgi?id=1907429
- https://bugzilla.redhat.com/show_bug.cgi?id=1926226
- https://access.redhat.com/security/updates/classification/#moderate
- https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/
- https://access.redhat.com/errata/RHSA-2021:1608 (Advisory)
Frequently Asked Questions
What is the severity of RHSA-2021:1608?
The severity of RHSA-2021:1608 is categorized as important.
How do I fix RHSA-2021:1608?
To fix RHSA-2021:1608, you should upgrade to python-cryptography version 3.2.1-4.el8 or later.
Which packages are affected by RHSA-2021:1608?
The affected packages include python-cryptography, python3-cryptography, and their related debug source packages.
Is RHSA-2021:1608 related to cryptographic vulnerabilities?
Yes, RHSA-2021:1608 addresses vulnerabilities within the cryptography library affecting its use in Python applications.
What should I do if I cannot upgrade to the recommended version for RHSA-2021:1608?
If you cannot upgrade, consider mitigating risks by monitoring for exploit attempts and reviewing application security practices.
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