CVE-2021-45960 / CVE-2022-22822 / CVE-2022-22823 / CVE-2022-22824 / CVE-2022-23852 / CVE-2022-25235 / CVE-2022-25236 / CVE-2022-25315: expat multiple CVEs

[Ghada Khalil]

This LP tracks the following expat related CVEs:

CVE-2021-45960: https://nvd.nist.gov/vuln/detail/CVE-2021-45960
In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).

CVE-2022-22822: https://nvd.nist.gov/vuln/detail/CVE-2022-22822
addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

CVE-2022-22823: https://nvd.nist.gov/vuln/detail/CVE-2022-22823
build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

CVE-2022-22824: https://nvd.nist.gov/vuln/detail/CVE-2022-22824
defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

CVE-2022-23852: https://nvd.nist.gov/vuln/detail/CVE-2022-23852
Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.

CVE-2022-25235: https://nvd.nist.gov/vuln/detail/CVE-2022-25235
xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context.

CVE-2022-25236: https://nvd.nist.gov/vuln/detail/CVE-2022-25236
xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs.

CVE-2022-25315: https://nvd.nist.gov/vuln/detail/CVE-2022-25315
In Expat (aka libexpat) before 2.4.5, there is an integer overflow in storeRawNames.

Score:
cve_id status cvss2Score av ac au ai
CVE-2021-45960 fixed 9 N L S C
CVE-2022-22822 fixed 7.5 N L N P
CVE-2022-22823 fixed 7.5 N L N P
CVE-2022-22824 fixed 7.5 N L N P
CVE-2022-23852 fixed 7.5 N L N P
CVE-2022-25235 fixed 7.5 N L N P
CVE-2022-25236 fixed 7.5 N L N P
CVE-2022-25315 fixed 7.5 N L N P

References:
https://access.redhat.com/security/cve/cve-2021-45960
https://bugzilla.redhat.com/show_bug.cgi?id=2044451
https://access.redhat.com/errata/RHSA-2022:1069
https://lists.centos.org/pipermail/centos-announce/2022-March/073580.html

Found during April 2022 CVE scan using vulscan

[Ghada Khalil (gkhalil)]

Screening: Marking as medium priority as this CVE meets the StarlingX fix criteria. Should be fixed in stx master and considered for cherry-pick to stx.6.0 if a maintenance release is planned

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/starlingx/tools/+/839267

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/tools/+/839267
Committed: https://opendev.org/starlingx/tools/commit/db943d695fad7be038cd95100728c73194bf1386
Submitter: "Zuul (22348)"
Branch: master

commit db943d695fad7be038cd95100728c73194bf1386
Author: Joe Slater <email address hidden>
Date: Mon Apr 25 14:38:32 2022 -0400

    expat: fix several CVEs

    CVE-2021-45960
    CVE-2022-22822
    CVE-2022-22823
    CVE-2022-22824
    CVE-2022-23852
    CVE-2022-25235
    CVE-2022-25236
    CVE-2022-25315

    Advance to expat-2.1.0-14.el7_9.

    === Testing ===
    build-iso; install; boot

     # run test to see if an xml file is well-formed
     $ xmlwf -c -d /tmp /etc/firewalld/zones/public.xml
     $ cat /tmp/public.xml # should look like an xml file
    ===

    Closes-bug: 1969362
    Change-Id: I78f1abc4253d0016fed6845202e00cab91e9ed11
    Signed-off-by: Joe Slater <email address hidden>