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Emerging Technologies: ERT-2022:2189-02 Important Ruby-OpenSSL Security Fix

red hat
Calendar Grey May 18, 2021
Dist Redhat Esm H88
This notice emphasizes a significant security enhancement for python-cryptography within RHEL, tackling vital issues.
An update for python-cryptography is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The python-cryptography packages contain a Python Cryptographic Authority's (PyCA's) cryptography library, which provides cryptographic primitives and recipes to Python developers.
The following packages have been upgraded to a later upstream version: python-cryptography (3.2.1). (BZ#1873581, BZ#1891947)
Security Fix(es):
* python-cryptography: bleichenbacher timing oracle attack against RSA decryption (CVE-2020-25659)
* 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)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat update red hat bug fix integer overflow timing attack python-cryptography

References

https://access.redhat.com/security/cve/CVE-2020-25659 https://access.redhat.com/security/cve/CVE-2020-36242 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/

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: python-cryptography-3.2.1-4.el8.src.rpm
aarch64: python-cryptography-debugsource-3.2.1-4.el8.aarch64.rpm python3-cryptography-3.2.1-4.el8.aarch64.rpm python3-cryptography-debuginfo-3.2.1-4.el8.aarch64.rpm
ppc64le: python-cryptography-debugsource-3.2.1-4.el8.ppc64le.rpm python3-cryptography-3.2.1-4.el8.ppc64le.rpm python3-cryptography-debuginfo-3.2.1-4.el8.ppc64le.rpm
s390x: python-cryptography-debugsource-3.2.1-4.el8.s390x.rpm python3-cryptography-3.2.1-4.el8.s390x.rpm python3-cryptography-debuginfo-3.2.1-4.el8.s390x.rpm
x86_64: python-cryptography-debugsource-3.2.1-4.el8.x86_64.rpm python3-cryptography-3.2.1-4.el8.x86_64.rpm python3-cryptography-debuginfo-3.2.1-4.el8.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/


Advisory ID: RHSA-2021:1608-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1608
Issue date: 2021-05-18

Topic

An update for python-cryptography is now available for Red Hat EnterpriseLinux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat update red hat bug fix integer overflow timing attack python-cryptography

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1778939 - internal pyca error with X25519, FIPS

1873581 - Rebase python-cryptography to 2.6+ for ed25519 support

1889988 - CVE-2020-25659 python-cryptography: bleichenbacher timing oracle attack against RSA decryption

1891947 - Rebase internal component python-cryptography-vectors1907429 - Re-add NPN bindings for PyOpenSSL

1926226 - CVE-2020-36242 python-cryptography: certain sequences of update() calls when symmetrically encrypting very large payloads could result in an integer overflow and lead to buffer overflows

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