RedHat: RHSA-2021-1608:01 Moderate: python-cryptography security, bug fix,
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.
Summary
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
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/
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.
Topic
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
