RedHat: RHSA-2021-1608:01 Moderate: python-cryptography security, b...
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: python-cryptography security, bug fix, and enhancement update
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
CVE Names:         CVE-2020-25659 CVE-2020-36242 
=====================================================================

1. Summary:

An update for python-cryptography is now available for Red Hat Enterprise
Linux 8.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

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

3. Description:

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.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

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-vectors
1907429 - 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

6. 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/

7. 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/

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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RedHat: RHSA-2021-1608:01 Moderate: python-cryptography security, bug fix,

An update for python-cryptography is now available for Red Hat Enterprise Linux 8

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.

Solution

For details on how to apply this update, which includes the changesdescribed in this advisory, refer to:https://access.redhat.com/articles/11258

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/

Severity
Advisory ID: RHSA-2021:1608-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1608
Issued Date: : 2021-05-18
CVE Names: CVE-2020-25659 CVE-2020-36242

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.

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-vectors

1907429 - 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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