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AUSCERT External Security Bulletin Redistribution
ESB-2021.2428
nettle security update
20 July 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: nettle
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20305
Reference: ESB-2021.2418
ESB-2021.2232
ESB-2021.2228
ESB-2021.2187
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:2760
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Red Hat Security Advisory
Synopsis: Important: nettle security update
Advisory ID: RHSA-2021:2760-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2760
Issue date: 2021-07-19
CVE Names: CVE-2021-20305
=====================================================================
1. Summary:
An update for nettle is now available for Red Hat Enterprise Linux 7.3
Advanced Update Support.
Red Hat Product Security has rated this update as having a security impact
of Important. 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 Server AUS (v. 7.3) - x86_64
3. Description:
Nettle is a cryptographic library that is designed to fit easily in almost
any context: In crypto toolkits for object-oriented languages, such as C++,
Python, or Pike, in applications like LSH or GNUPG, or even in kernel
space.
Security Fix(es):
* nettle: Out of bounds memory access in signature verification
(CVE-2021-20305)
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.
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/):
1942533 - CVE-2021-20305 nettle: Out of bounds memory access in signature verification
6. Package List:
Red Hat Enterprise Linux Server AUS (v. 7.3):
Source:
nettle-2.7.1-9.el7_3.src.rpm
x86_64:
nettle-2.7.1-9.el7_3.i686.rpm
nettle-2.7.1-9.el7_3.x86_64.rpm
nettle-debuginfo-2.7.1-9.el7_3.i686.rpm
nettle-debuginfo-2.7.1-9.el7_3.x86_64.rpm
nettle-devel-2.7.1-9.el7_3.i686.rpm
nettle-devel-2.7.1-9.el7_3.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-2021-20305
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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