CVE-2022-26305: Execution of Untrusted Macros Due to Improper Certificate Validation

Published Jul 25, 2022
·
Updated

An Improper Certificate Validation vulnerability in LibreOffice existed where determining if a macro was signed by a trusted author was done by only matching the serial number and issuer string of the used certificate with that of a trusted certificate. This is not sufficient to verify that the macro was actually signed with the certificate. An adversary could therefore create an arbitrary certificate with a serial number and an issuer string identical to a trusted certificate which LibreOffice would present as belonging to the trusted author, potentially leading to the user to execute arbitrary code contained in macros improperly trusted. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.7; 7.3 versions prior to 7.3.1.

Affected Software

16 affected componentsFixes available
LibreOffice Libreoffice>=7.2.0<7.2.7
LibreOffice Libreoffice>=7.3.0<7.3.2
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
alpine/libreoffice>=7.2.0<7.2.7.2-r0
7.2.7.2-r0
debian/libreoffice<1:7.3.2~rc2-1
1:7.3.2~rc2-1
debian/libreoffice<1:7.3.2~rc2-1
1:7.3.2~rc2-1
debian/libreoffice<1:7.3.2~rc2-1
1:7.3.2~rc2-1
debian/libreoffice
4:7.4.7-1+deb12u144:7.4.7-1+deb12u134:25.2.3-2+deb13u64:25.2.3-2+deb13u84:26.8.2.2-2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade alpine/libreoffice to a version that resolves this vulnerability.

    Fixed in 7.2.7.2-r0
  2. Upgrade

    Upgrade debian/libreoffice to a version that resolves this vulnerability.

    Fixed in 1:7.3.2~rc2-1
  3. Upgrade

    Upgrade debian/libreoffice to a version that resolves this vulnerability.

    Fixed in 4:7.4.7-1+deb12u14Fixed in 4:7.4.7-1+deb12u13Fixed in 4:25.2.3-2+deb13u6Fixed in 4:25.2.3-2+deb13u8Fixed in 4:26.8.2.2-2
  4. Upgrade

    Upgrade LibreOffice to a version that resolves this vulnerability.

    Fixed in 7.2.7
  5. Upgrade

    Upgrade LibreOffice to a version that resolves this vulnerability.

    Fixed in 7.3.1

Event History

Jul 25, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionWeakness
Data Sourced
via NVD·03:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·03:15 PM
DescriptionSeverityAffected Software
Aug 16, 2022
Data Sourced
via Red Hat·09:24 AM
DescriptionSeverityAffected Software

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2022-26305?

CVE-2022-26305 is an Improper Certificate Validation vulnerability in LibreOffice.

2

How does CVE-2022-26305 impact LibreOffice?

CVE-2022-26305 allows an attacker to successfully pass off a malicious macro as being signed by a trusted author.

3

What is the severity of CVE-2022-26305?

CVE-2022-26305 has a severity rating of 7.5, which is considered high.

4

Which versions of LibreOffice are affected by CVE-2022-26305?

LibreOffice versions 7.2.0 to 7.2.7 and 7.3.0 to 7.3.2 are affected by CVE-2022-26305.

5

How can I fix CVE-2022-26305?

To fix CVE-2022-26305, it is recommended to update LibreOffice to a version that has the necessary security patches.

Company

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