CVE-2023-29469: Input Validation

Published Apr 11, 2023
·
Updated

Accessibility. A privacy issue was addressed with improved private data redaction for log entries.

Other sources

Accessibility. This issue was addressed with improved checks.

— Apple

Accounts. A permissions issue was addressed with improved redaction of sensitive information.

— Apple

AMD. A buffer overflow issue was addressed with improved memory handling.

— Apple

An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).

— MITRE

Apple Neural Engine. The issue was addressed with improved memory handling.

— Apple

Credit

OSS-Fuzz(Google Project Zero), (Google Project Zero), Ned Williamson(Google Project Zero), Gerhard Muth, Dimitrios Tatsis(Cisco Talos), Mickey Jin@@patch1t, Zitong Wu (吴梓桐)(Zhuhai No), Adam M., Meysam Firouzi@@R00tkitSMM(Mbition Mercedes), Meysam Firouzi@@R00tkitsmm(Trend Micro Zero Day Initiative), hou xuewei vmk msu@@p1ay8y3ar, CertiK SkyFall Team(Pinauten GmbH), Linus Henze(Pinauten GmbH), 08Tc3wBB(Jamf), James Duffy (mangoSecure), Adam Doupé(ASU SEFCOM), Eloi Benoist-Vanderbeken@@elvanderb(Synacktiv), Wojciech Reguła@@_r3ggi(SecuRing), Jonathan Bar Or(Microsoft), Anurag Bohra(Microsoft), (Microsoft), Michael Pearse(Microsoft), Thijs Alkemade@@xnyhps(Computest Sector 7), Gergely Kalman@@gergely_kalman, Michael DePlante@@izobashi(Trend Micro Zero Day Initiative), Thijs Alkemade(Computest Sector 7), Jonathan Fritz, Arsenii Kostromin (0x3c3e), Julian Szulc, Holger Fuhrmannek(Deutsche Telekom Security GmbH on behalf of BSI), Yiğit Can YILMAZ@@yilmazcanyigit(FFRI Security Inc), Koh M. Nakagawa(FFRI Security Inc), Kirin@@Pwnrin(Offensive Security), Jeff Johnson (underpassapp.com)(Offensive Security), (Offensive Security), Csaba Fitzl@@theevilbit(Offensive Security), Kirin@@Pwnrin, Wenchao Li(Alibaba Group), Xiaolong Bai(Alibaba Group), Mickey Jin@@patch1t(Tencent Security Xuanwu Lab), Zhipeng Huo@@R3dF09(Tencent Security Xuanwu Lab), an anonymous researcher, Khiem Tran, Gergely Kalman@@gergely_kalman(SecuRing), (SecuRing), Wojciech Reguła(SecuRing), Yiğit Can YILMAZ@@yilmazcanyigit, CVE-2023-22809, Satish Panduranga, Ivan Fratric(Google Project Zero), Wojciech Regula(SecuRing), Ignacio Sanmillan@@ulexec, Clément Lecigne(Google's Threat Analysis Group), Donncha Ó Cearbhaill(Amnesty International), Pan ZhenPeng@@Peterpan0927(STAR Labs SG Pte), Sergii Kryvoblotskyi(MacPaw Inc), ABC Research s.r.o., Jiwon Park, Mohamed GHANNAM@@_simo36, Amat Cama(Vigilant Labs)

Affected Software

6 affected componentsFixes available
Apple macOS Ventura<13.4
13.4
Xmlsoft Libxml2<2.10.4
Debian Debian Linux=10.0
Apple iOS<16.5
16.5
Apple iPadOS<16.5
16.5
redhat/libxml2<2.10.4
2.10.4

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade macOS Ventura to a version that resolves this vulnerability.

    Fixed in 13.4
  2. Upgrade

    Upgrade Apple iOS and iPadOS to a version that resolves this vulnerability.

    Fixed in 16.5
  3. Upgrade

    Upgrade Apple iOS, iPadOS, and macOS to a version that resolves this vulnerability.

    Fixed in 16.5
  4. Upgrade

    Upgrade redhat/libxml2 to a version that resolves this vulnerability.

    Fixed in 2.10.4
  5. Upgrade

    Upgrade libxml2 to a version that resolves this vulnerability.

    Fixed in 2.10.4
  6. Configuration

    Restrict options offered on a locked device.

    libxml2 (options handling on locked device) restrict options offered = restricted
  7. Compensating control

    Force hardened runtime on the affected binaries at the system level.

  8. Compensating control

    For iOS/macOS Apple environments, ensure the affected binaries have improved entitlements as described in the upstream fix (apply the updated libxml2 package that includes the entitlements changes).

Event History

Apr 11, 2023
Data Sourced
via Red Hat·07:13 PM
DescriptionSeverityAffected Software
Apr 24, 2023
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the vulnerability ID for this issue?

The vulnerability ID for this issue is CVE-2023-29469.

2

What is the severity of CVE-2023-29469?

The severity of CVE-2023-29469 is medium with a CVSS score of 6.5.

3

What is the affected software?

The affected software is libxml2 versions up to and excluding 2.10.4.

4

How can I fix CVE-2023-29469?

To fix CVE-2023-29469, you should update to libxml2 version 2.10.4 or above.

5

Where can I find more information about CVE-2023-29469?

You can find more information about CVE-2023-29469 in the following references: [Link 1](https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4), [Link 2](https://gitlab.gnome.org/GNOME/libxml2/-/commit/09a2dd453007f9c7205274623acdd73747c22d64), [Link 3](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2185985).

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