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Red Hat Security Advisory 2023-1842-01

Red Hat Security Advisory 2023-1842-01 - The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP. Issues addressed include a denial of service vulnerability.

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Hash: SHA256

====================================================================
Red Hat Security Advisory

Synopsis: Moderate: curl security update
Advisory ID: RHSA-2023:1842-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:1842
Issue date: 2023-04-18
CVE Names: CVE-2023-23916
====================================================================

  1. Summary:

An update for curl is now available for Red Hat Enterprise Linux 8.6
Extended Update Support.

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.

  1. Relevant releases/architectures:

Red Hat Enterprise Linux BaseOS EUS (v.8.6) - aarch64, ppc64le, s390x, x86_64

  1. Description:

The curl packages provide the libcurl library and the curl utility for
downloading files from servers using various protocols, including HTTP,
FTP, and LDAP.

Security Fix(es):

  • curl: HTTP multi-header compression denial of service (CVE-2023-23916)

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.

  1. 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

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

2167815 - CVE-2023-23916 curl: HTTP multi-header compression denial of service

  1. Package List:

Red Hat Enterprise Linux BaseOS EUS (v.8.6):

Source:
curl-7.61.1-22.el8_6.6.src.rpm

aarch64:
curl-7.61.1-22.el8_6.6.aarch64.rpm
curl-debuginfo-7.61.1-22.el8_6.6.aarch64.rpm
curl-debugsource-7.61.1-22.el8_6.6.aarch64.rpm
curl-minimal-debuginfo-7.61.1-22.el8_6.6.aarch64.rpm
libcurl-7.61.1-22.el8_6.6.aarch64.rpm
libcurl-debuginfo-7.61.1-22.el8_6.6.aarch64.rpm
libcurl-devel-7.61.1-22.el8_6.6.aarch64.rpm
libcurl-minimal-7.61.1-22.el8_6.6.aarch64.rpm
libcurl-minimal-debuginfo-7.61.1-22.el8_6.6.aarch64.rpm

ppc64le:
curl-7.61.1-22.el8_6.6.ppc64le.rpm
curl-debuginfo-7.61.1-22.el8_6.6.ppc64le.rpm
curl-debugsource-7.61.1-22.el8_6.6.ppc64le.rpm
curl-minimal-debuginfo-7.61.1-22.el8_6.6.ppc64le.rpm
libcurl-7.61.1-22.el8_6.6.ppc64le.rpm
libcurl-debuginfo-7.61.1-22.el8_6.6.ppc64le.rpm
libcurl-devel-7.61.1-22.el8_6.6.ppc64le.rpm
libcurl-minimal-7.61.1-22.el8_6.6.ppc64le.rpm
libcurl-minimal-debuginfo-7.61.1-22.el8_6.6.ppc64le.rpm

s390x:
curl-7.61.1-22.el8_6.6.s390x.rpm
curl-debuginfo-7.61.1-22.el8_6.6.s390x.rpm
curl-debugsource-7.61.1-22.el8_6.6.s390x.rpm
curl-minimal-debuginfo-7.61.1-22.el8_6.6.s390x.rpm
libcurl-7.61.1-22.el8_6.6.s390x.rpm
libcurl-debuginfo-7.61.1-22.el8_6.6.s390x.rpm
libcurl-devel-7.61.1-22.el8_6.6.s390x.rpm
libcurl-minimal-7.61.1-22.el8_6.6.s390x.rpm
libcurl-minimal-debuginfo-7.61.1-22.el8_6.6.s390x.rpm

x86_64:
curl-7.61.1-22.el8_6.6.x86_64.rpm
curl-debuginfo-7.61.1-22.el8_6.6.i686.rpm
curl-debuginfo-7.61.1-22.el8_6.6.x86_64.rpm
curl-debugsource-7.61.1-22.el8_6.6.i686.rpm
curl-debugsource-7.61.1-22.el8_6.6.x86_64.rpm
curl-minimal-debuginfo-7.61.1-22.el8_6.6.i686.rpm
curl-minimal-debuginfo-7.61.1-22.el8_6.6.x86_64.rpm
libcurl-7.61.1-22.el8_6.6.i686.rpm
libcurl-7.61.1-22.el8_6.6.x86_64.rpm
libcurl-debuginfo-7.61.1-22.el8_6.6.i686.rpm
libcurl-debuginfo-7.61.1-22.el8_6.6.x86_64.rpm
libcurl-devel-7.61.1-22.el8_6.6.i686.rpm
libcurl-devel-7.61.1-22.el8_6.6.x86_64.rpm
libcurl-minimal-7.61.1-22.el8_6.6.i686.rpm
libcurl-minimal-7.61.1-22.el8_6.6.x86_64.rpm
libcurl-minimal-debuginfo-7.61.1-22.el8_6.6.i686.rpm
libcurl-minimal-debuginfo-7.61.1-22.el8_6.6.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/

  1. References:

https://access.redhat.com/security/cve/CVE-2023-23916
https://access.redhat.com/security/updates/classification/#moderate

  1. Contact:

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

Copyright 2023 Red Hat, Inc.
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An allocation of resources without limits or throttling vulnerability exists in curl <v7.88.0 based on the "chained" HTTP compression algorithms, meaning that a server response can be compressed multiple times and potentially with differentalgorithms. The number of acceptable "links" in this "decompression chain" wascapped, but the cap was implemented on a per-header basis allowing a maliciousserver to insert a virtually unlimited number of compression steps simply byusing many headers. The use of such a decompression chain could result in a "malloc bomb", making curl end up spending enormous amounts of allocated heap memory, or trying to and returning out of memory errors.

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