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             AUSCERT External Security Bulletin Redistribution             
                                                                           
                               ESB-2024.1218                               
                          unbound security update                          
                             27 February 2024                              
                                                                           
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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           unbound                                                 
Publisher:         Red Hat                                                 
Operating System:  Red Hat                                                 
Resolution:        Patch/Upgrade                                           
CVE Names:         CVE-2023-50868 CVE-2023-50387                           

Original Bulletin:
   https://access.redhat.com/errata/RHSA-2024:0965

Comment: CVSS (Max):  7.5 CVE-2023-50868 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
         CVSS Source: Red Hat                                              
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H


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                Red Hat Security Advisory

Synopsis:          Important: unbound security update
Advisory ID:       RHSA-2024:0965
Product:           Red Hat Enterprise Linux AppStream (v. 8)
Advisory URL:      https://access.redhat.com/errata/RHSA-2024:0965
Issue date:        2024-02-26
CVE Names:         CVE-2023-50387 CVE-2023-50868
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1. Summary:

An update for unbound is now available for Red Hat Enterprise Linux 8.

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 AppStream (v. 8) - aarch64, ppc64le, x86_64, i686,
s390x

3. Description:

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC
resolver.

Security Fix(es):

* bind9: KeyTrap - Extreme CPU consumption in DNSSEC validator (CVE-2023-50387)

* bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources
(CVE-2023-50868)

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/):

2263914 - CVE-2023-50387 - bind9: KeyTrap - Extreme CPU consumption in DNSSEC
validator
2263917 - CVE-2023-50868 - bind9: Preparing an NSEC3 closest encloser proof can
exhaust CPU resources

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8)

aarch64:
python3-unbound-0:1.16.2-5.el8_9.2.aarch64.rpm
python3-unbound-debuginfo-0:1.16.2-5.el8_9.2.aarch64.rpm
unbound-0:1.16.2-5.el8_9.2.aarch64.rpm
unbound-debuginfo-0:1.16.2-5.el8_9.2.aarch64.rpm
unbound-debugsource-0:1.16.2-5.el8_9.2.aarch64.rpm
unbound-devel-0:1.16.2-5.el8_9.2.aarch64.rpm
unbound-libs-0:1.16.2-5.el8_9.2.aarch64.rpm
unbound-libs-debuginfo-0:1.16.2-5.el8_9.2.aarch64.rpm

ppc64le:
python3-unbound-0:1.16.2-5.el8_9.2.ppc64le.rpm
python3-unbound-debuginfo-0:1.16.2-5.el8_9.2.ppc64le.rpm
unbound-0:1.16.2-5.el8_9.2.ppc64le.rpm
unbound-debuginfo-0:1.16.2-5.el8_9.2.ppc64le.rpm
unbound-debugsource-0:1.16.2-5.el8_9.2.ppc64le.rpm
unbound-devel-0:1.16.2-5.el8_9.2.ppc64le.rpm
unbound-libs-0:1.16.2-5.el8_9.2.ppc64le.rpm
unbound-libs-debuginfo-0:1.16.2-5.el8_9.2.ppc64le.rpm

s390x:
python3-unbound-0:1.16.2-5.el8_9.2.s390x.rpm
python3-unbound-debuginfo-0:1.16.2-5.el8_9.2.s390x.rpm
unbound-0:1.16.2-5.el8_9.2.s390x.rpm
unbound-debuginfo-0:1.16.2-5.el8_9.2.s390x.rpm
unbound-debugsource-0:1.16.2-5.el8_9.2.s390x.rpm
unbound-devel-0:1.16.2-5.el8_9.2.s390x.rpm
unbound-libs-0:1.16.2-5.el8_9.2.s390x.rpm
unbound-libs-debuginfo-0:1.16.2-5.el8_9.2.s390x.rpm

x86_64:
python3-unbound-0:1.16.2-5.el8_9.2.x86_64.rpm
python3-unbound-debuginfo-0:1.16.2-5.el8_9.2.x86_64.rpm
unbound-0:1.16.2-5.el8_9.2.x86_64.rpm
unbound-debuginfo-0:1.16.2-5.el8_9.2.x86_64.rpm
unbound-debugsource-0:1.16.2-5.el8_9.2.x86_64.rpm
unbound-devel-0:1.16.2-5.el8_9.2.x86_64.rpm
unbound-libs-0:1.16.2-5.el8_9.2.x86_64.rpm
unbound-libs-debuginfo-0:1.16.2-5.el8_9.2.x86_64.rpm

i686:
python3-unbound-debuginfo-0:1.16.2-5.el8_9.2.i686.rpm
unbound-debuginfo-0:1.16.2-5.el8_9.2.i686.rpm
unbound-debugsource-0:1.16.2-5.el8_9.2.i686.rpm
unbound-devel-0:1.16.2-5.el8_9.2.i686.rpm
unbound-libs-0:1.16.2-5.el8_9.2.i686.rpm
unbound-libs-debuginfo-0:1.16.2-5.el8_9.2.i686.rpm

Source:
unbound-0:1.16.2-5.el8_9.2.src.rpm

7. References:

https://access.redhat.com/security/cve/CVE-2023-50387
https://access.redhat.com/security/cve/CVE-2023-50868
https://access.redhat.com/security/updates/classification/#important

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