==========================================================================
Ubuntu Security Notice USN-7027-1
September 19, 2024

emacs, emacs24, emacs25 vulnerabilities
==========================================================================

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

- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Emacs.

Software Description:
- emacs: GNU Emacs editor (metapackage)
- emacs25: GNU Emacs editor (with GTK+ GUI support)
- emacs24: GNU Emacs editor

Details:

It was discovered that Emacs incorrectly handled input sanitization. An
attacker could possibly use this issue to execute arbitrary commands. This
issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04
LTS. (CVE-2022-45939)

Xi Lu discovered that Emacs incorrectly handled input sanitization. An
attacker could possibly use this issue to execute arbitrary commands. This
issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS
and Ubuntu 22.04 LTS. (CVE-2022-48337)

Xi Lu discovered that Emacs incorrectly handled input sanitization. An
attacker could possibly use this issue to execute arbitrary commands. This
issue only affected Ubuntu 22.04 LTS. (CVE-2022-48338)

Xi Lu discovered that Emacs incorrectly handled input sanitization. An
attacker could possibly use this issue to execute arbitrary commands. This
issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04
LTS. (CVE-2022-48339)

It was discovered that Emacs incorrectly handled filename sanitization. An
attacker could possibly use this issue to execute arbitrary commands. This
issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04
LTS. (CVE-2023-28617)

It was discovered that Emacs incorrectly handled certain crafted files. An
attacker could possibly use this issue to crash the program, resulting in
a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-30203,
CVE-2024-30204, CVE-2024-30205)

It was discovered that Emacs incorrectly handled certain crafted files. An
attacker could possibly use this issue to execute arbitrary commands.
(CVE-2024-39331)

Update instructions:

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

Ubuntu 24.04 LTS
   emacs                           1:29.3+1-1ubuntu2+esm1
                                   Available with Ubuntu Pro
   emacs-bin-common                1:29.3+1-1ubuntu2+esm1
                                   Available with Ubuntu Pro
   emacs-common                    1:29.3+1-1ubuntu2+esm1
                                   Available with Ubuntu Pro
   emacs-el                        1:29.3+1-1ubuntu2+esm1
                                   Available with Ubuntu Pro

Ubuntu 22.04 LTS
   emacs                           1:27.1+1-3ubuntu5.2
   emacs-bin-common                1:27.1+1-3ubuntu5.2
   emacs-common                    1:27.1+1-3ubuntu5.2
   emacs-el                        1:27.1+1-3ubuntu5.2

Ubuntu 20.04 LTS
   emacs                           1:26.3+1-1ubuntu2+esm1
                                   Available with Ubuntu Pro
   emacs-bin-common                1:26.3+1-1ubuntu2+esm1
                                   Available with Ubuntu Pro
   emacs-common                    1:26.3+1-1ubuntu2+esm1
                                   Available with Ubuntu Pro
   emacs-el                        1:26.3+1-1ubuntu2+esm1
                                   Available with Ubuntu Pro

Ubuntu 18.04 LTS
   emacs25                         25.2+1-6ubuntu0.1~esm2
                                   Available with Ubuntu Pro
   emacs25-bin-common              25.2+1-6ubuntu0.1~esm2
                                   Available with Ubuntu Pro
   emacs25-common                  25.2+1-6ubuntu0.1~esm2
                                   Available with Ubuntu Pro
   emacs25-el                      25.2+1-6ubuntu0.1~esm2
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   emacs24                         24.5+1-6ubuntu1.1+esm4
                                   Available with Ubuntu Pro
   emacs24-bin-common              24.5+1-6ubuntu1.1+esm4
                                   Available with Ubuntu Pro
   emacs24-common                  24.5+1-6ubuntu1.1+esm4
                                   Available with Ubuntu Pro
   emacs24-el                      24.5+1-6ubuntu1.1+esm4
                                   Available with Ubuntu Pro

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

References:
   https://ubuntu.com/security/notices/USN-7027-1
   CVE-2022-45939, CVE-2022-48337, CVE-2022-48338, CVE-2022-48339,
   CVE-2023-28617, CVE-2024-30203, CVE-2024-30204, CVE-2024-30205,
   CVE-2024-39331,https://launchpad.net/bugs/2070418

Package Information:
   https://launchpad.net/ubuntu/+source/emacs/1:27.1+1-3ubuntu5.2