Ubuntu 6923 Published by

Ubuntu Linux has been updated with security updates, including a fix for a Roundcube Webmail vulnerability and libjxl vulnerabilities:

[USN-7636-1] Roundcube Webmail vulnerability
[USN-7637-1] libjxl vulnerabilities




[USN-7636-1] Roundcube Webmail vulnerability


==========================================================================
Ubuntu Security Notice USN-7636-1
July 14, 2025

roundcube vulnerability
==========================================================================

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

- Ubuntu 24.04 LTS

Summary:

Roundcube Webmail could be made to expose sensitive information over the
network.

Software Description:
- roundcube: skinnable AJAX based webmail solution for IMAP servers

Details:

It was discovered that Roundcube Webmail incorrectly handled sanitization in
the message_body function. A remote attacker could possibly use this issue to
send and receive emails as another user.

Update instructions:

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

Ubuntu 24.04 LTS
roundcube 1.6.6+dfsg-2ubuntu0.1+esm1
Available with Ubuntu Pro
roundcube-core 1.6.6+dfsg-2ubuntu0.1+esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-7636-1
CVE-2024-42009



[USN-7637-1] libjxl vulnerabilities


==========================================================================
Ubuntu Security Notice USN-7637-1
July 14, 2025

jpeg-xl vulnerabilities
==========================================================================

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

- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in libjxl.

Software Description:
- jpeg-xl: Reference codec implementation for JPEG XL compressed raster image format

Details:

It was discovered that libjxl did not perform proper bounds checking
when parsing Exif tags. An attacker could possibly use this issue to
cause libjxl to crash, resulting in a denial of service. (CVE-2023-0645)

It was discovered that libjxl did not perform proper bounds checking
when decoding patches. An attacker could possibly use this issue to
cause libjxl to enter an infinite loop, resulting in a denial of
service. (CVE-2023-35790)

It was discovered that libjxl did not perform proper bounds checking
when performing JPEG recompression. An attacker could possibly use this
issue to cause libjxl to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2024-11403)

It was discovered that libjxl incorrectly handled parsing certain image
files. An attacker could possibly use this issue to cause libjxl to
consume excessive amounts of memory, resulting in a denial of service.
(CVE-2024-11498)

Update instructions:

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

Ubuntu 24.04 LTS
libjpegxl-java 0.7.0-10.2ubuntu6.1
libjxl-tools 0.7.0-10.2ubuntu6.1
libjxl0.7 0.7.0-10.2ubuntu6.1

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

References:
https://ubuntu.com/security/notices/USN-7637-1
CVE-2023-0645, CVE-2023-35790, CVE-2024-11403, CVE-2024-11498

Package Information:
https://launchpad.net/ubuntu/+source/jpeg-xl/0.7.0-10.2ubuntu6.1