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Ubuntu Security Notice USN-5694-1

Ubuntu Security Notice 5694-1 - It was discovered that LibreOffice incorrectly handled links using the Office URI Schemes. If a user were tricked into opening a specially crafted document, a remote attacker could use this issue to execute arbitrary scripts. Thomas Florian discovered that LibreOffice incorrectly handled crashes when an encrypted document is open. If the document is recovered upon restarting LibreOffice, subsequent saves of the document were unencrypted. This issue only affected Ubuntu 18.04 LTS.

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Ubuntu Security Notice USN-5694-1
October 20, 2022

libreoffice vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 22.04 LTS
  • Ubuntu 20.04 LTS
  • Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in LibreOffice.

Software Description:

  • libreoffice: Office productivity suite

Details:

It was discovered that LibreOffice incorrectly handled links using the
Office URI Schemes. If a user were tricked into opening a specially
crafted document, a remote attacker could use this issue to execute
arbitrary scripts. (CVE-2022-3140)

Thomas Florian discovered that LibreOffice incorrectly handled crashes when
an encrypted document is open. If the document is recovered upon restarting
LibreOffice, subsequent saves of the document were unencrypted. This issue
only affected Ubuntu 18.04 LTS. (CVE-2020-12801)

Jens Müller discovered that LibreOffice incorrectly handled certain
documents containing forms. If a user were tricked into opening a specially
crafted document, a remote attacker could overwrite arbitrary files when
the form was submitted. This issue only affected Ubuntu 18.04 LTS.
(CVE-2020-12803)

It was discovered that LibreOffice incorrectly validated macro signatures.
If a user were tricked into opening a specially crafted document, a remote
attacker could possibly use this issue to execute arbitrary macros. This
issue only affected Ubuntu 18.04 LTS. (CVE-2022-26305)

It was discovered that Libreoffice incorrectly handled encrypting the
master key provided by the user for storing passwords for web connections.
A local attacker could possibly use this issue to obtain access to
passwords stored in the user’s configuration data. This issue only affected
Ubuntu 18.04 LTS. (CVE-2022-26306, CVE-2022-26307)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
libreoffice 1:7.3.6-0ubuntu0.22.04.2

Ubuntu 20.04 LTS:
libreoffice 1:6.4.7-0ubuntu0.20.04.6

Ubuntu 18.04 LTS:
libreoffice 1:6.0.7-0ubuntu0.18.04.12

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5694-1
CVE-2020-12801, CVE-2020-12803, CVE-2022-26305, CVE-2022-26306,
CVE-2022-26307, CVE-2022-3140

Package Information:
https://launchpad.net/ubuntu/+source/libreoffice/1:7.3.6-0ubuntu0.22.04.2
https://launchpad.net/ubuntu/+source/libreoffice/1:6.4.7-0ubuntu0.20.04.6
https://launchpad.net/ubuntu/+source/libreoffice/1:6.0.7-0ubuntu0.18.04.12

Related news

Red Hat Security Advisory 2023-0089-01

Red Hat Security Advisory 2023-0089-01 - LibreOffice is an open source, community-developed office productivity suite. It includes key desktop applications, such as a word processor, a spreadsheet, a presentation manager, a formula editor, and a drawing program. LibreOffice replaces OpenOffice and provides a similar but enhanced and extended office suite. Issues addressed include a script execution vulnerability.

Gentoo Linux Security Advisory 202212-04

Gentoo Linux Security Advisory 202212-4 - A vulnerability has been discovered in LibreOffice which could result in arbitrary script execution via crafted links. Versions less than 7.3.6.2 are affected.

CVE-2022-3140: CVE-2022-3140 | LibreOffice - Free Office Suite - Based on OpenOffice

LibreOffice supports Office URI Schemes to enable browser integration of LibreOffice with MS SharePoint server. An additional scheme 'vnd.libreoffice.command' specific to LibreOffice was added. In the affected versions of LibreOffice links using that scheme could be constructed to call internal macros with arbitrary arguments. Which when clicked on, or activated by document events, could result in arbitrary script execution without warning. This issue affects: The Document Foundation LibreOffice 7.4 versions prior to 7.4.1; 7.3 versions prior to 7.3.6.

Ubuntu Security Notice USN-5661-1

Ubuntu Security Notice 5661-1 - It was discovered that LibreOffice incorrectly validated macro signatures. If a user were tricked into opening a specially crafted document, a remote attacker could possibly use this issue to execute arbitrary macros. It was discovered that Libreoffice incorrectly handled encrypting the master key provided by the user for storing passwords for web connections. A local attacker could possibly use this issue to obtain access to passwords stored in the user's configuration data.

Ubuntu Security Notice USN-5661-1

Ubuntu Security Notice 5661-1 - It was discovered that LibreOffice incorrectly validated macro signatures. If a user were tricked into opening a specially crafted document, a remote attacker could possibly use this issue to execute arbitrary macros. It was discovered that Libreoffice incorrectly handled encrypting the master key provided by the user for storing passwords for web connections. A local attacker could possibly use this issue to obtain access to passwords stored in the user's configuration data.

Ubuntu Security Notice USN-5661-1

Ubuntu Security Notice 5661-1 - It was discovered that LibreOffice incorrectly validated macro signatures. If a user were tricked into opening a specially crafted document, a remote attacker could possibly use this issue to execute arbitrary macros. It was discovered that Libreoffice incorrectly handled encrypting the master key provided by the user for storing passwords for web connections. A local attacker could possibly use this issue to obtain access to passwords stored in the user's configuration data.

LibreOffice Releases Software Update to Patch 3 New Vulnerabilities

The team behind LibreOffice has released security updates to fix three security flaws in the productivity software, one of which could be exploited to achieve arbitrary code execution on affected systems. Tracked as CVE-2022-26305, the issue has been described as a case of improper certificate validation when checking whether a macro is signed by a trusted author, leading to the execution of

LibreOffice Releases Software Update to Patch 3 New Vulnerabilities

The team behind LibreOffice has released security updates to fix three security flaws in the productivity software, one of which could be exploited to achieve arbitrary code execution on affected systems. Tracked as CVE-2022-26305, the issue has been described as a case of improper certificate validation when checking whether a macro is signed by a trusted author, leading to the execution of

LibreOffice Releases Software Update to Patch 3 New Vulnerabilities

The team behind LibreOffice has released security updates to fix three security flaws in the productivity software, one of which could be exploited to achieve arbitrary code execution on affected systems. Tracked as CVE-2022-26305, the issue has been described as a case of improper certificate validation when checking whether a macro is signed by a trusted author, leading to the execution of

CVE-2022-26306: CVE-2022-26306 | LibreOffice - Free Office Suite - Based on OpenOffice

LibreOffice supports the storage of passwords for web connections in the user’s configuration database. The stored passwords are encrypted with a single master key provided by the user. A flaw in LibreOffice existed where the required initialization vector for encryption was always the same which weakens the security of the encryption making them vulnerable if an attacker has access to the user's configuration data. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.7; 7.3 versions prior to 7.3.1.

CVE-2022-26307: CVE-2022-26307 | LibreOffice - Free Office Suite - Based on OpenOffice

LibreOffice supports the storage of passwords for web connections in the user’s configuration database. The stored passwords are encrypted with a single master key provided by the user. A flaw in LibreOffice existed where master key was poorly encoded resulting in weakening its entropy from 128 to 43 bits making the stored passwords vulerable to a brute force attack if an attacker has access to the users stored config. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.7; 7.3 versions prior to 7.3.3.

CVE-2022-26305: CVE-2022-26305 | LibreOffice - Free Office Suite - Based on OpenOffice

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.

CVE-2020-12803: CVE-2020-12803 | LibreOffice - Free Office Suite - Based on OpenOffice

ODF documents can contain forms to be filled out by the user. Similar to HTML forms, the contained form data can be submitted to a URI, for example, to an external web server. To create submittable forms, ODF implements the XForms W3C standard, which allows data to be submitted without the need for macros or other active scripting Prior to version 6.4.4 LibreOffice allowed forms to be submitted to any URI, including file: URIs, enabling form submissions to overwrite local files. User-interaction is required to submit the form, but to avoid the possibility of malicious documents engineered to maximize the possibility of inadvertent user submission this feature has now been limited to http[s] URIs, removing the possibility to overwrite local files. This issue affects: The Document Foundation LibreOffice versions prior to 6.4.4.

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