Alerts This Week
Warning Icon 1 758
Alerts This Week
Warning Icon 1 758

Ubuntu 20.04: PHP Security Advisory 7648-3 CVE-2025-1735 DoS Issue

ubuntu
Calendar Grey September 4, 2025
Dist Ubuntu Esm H88
The latest update from Ubuntu addresses a bug affecting PHP versions 7.0, 7.2, and 7.4, reinforcing service reliability.
USN-7648-2 introduced a regression in PHP

Summary

USN-7648-2 introduced a regression in PHP

Software Description:

- php7.4: HTML-embedded scripting language interpreter

- php7.2: HTML-embedded scripting language interpreter

- php7.0: HTML-embedded scripting language interpreter

Details:

USN-7648-2 fixed vulnerabilities in PHP. The patch for CVE-2025-1735

caused a regression in php7.0, php7.2 and php7.4. This update fixes

the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that PHP incorrectly handled certain hostnames containing

null characters. A remote attacker could possibly use this issue to bypass

certain hostname validation checks. (CVE-2025-1220)

It was discovered that PHP incorrectly handled the pgsql and pdo_pgsql

escaping functions. A remote attacker could possibly use this issue to

cause PHP to crash, resulting in a denial of service. (CVE-2025-1735)

It was discovered that PHP incorrectly handled parsing certain XML data in

SOAP extensions. A remote attacker coul...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical php DoS Ubuntu

Update Instructions

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

Ubuntu 20.04 LTS
  php7.4                          7.4.3-4ubuntu2.29+esm2
                                  Available with Ubuntu Pro
  php7.4-cgi                      7.4.3-4ubuntu2.29+esm2
                                  Available with Ubuntu Pro
  php7.4-cli                      7.4.3-4ubuntu2.29+esm2
                                  Available with Ubuntu Pro
  php7.4-common                   7.4.3-4ubuntu2.29+esm2
                                  Available with Ubuntu Pro
  php7.4-fpm                      7.4.3-4ubuntu2.29+esm2
                                  Available with Ubuntu Pro
  php7.4-pgsql                    7.4.3-4ubuntu2.29+esm2
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  php7.2                          7.2.24-0ubuntu0.18.04.17+esm11
                                  Available with Ubuntu Pro
  php7.2-cgi                      7.2.24-0ubuntu0.18.04.17+esm11
                                  Available with Ubuntu Pro
  php7.2-cli                      7.2.24-0ubuntu0.18.04.17+esm11
                                  Available with Ubuntu Pro
  php7.2-fpm                      7.2.24-0ubuntu0.18.04.17+esm11
                                  Available with Ubuntu Pro
  php7.2-pgsql                    7.2.24-0ubuntu0.18.04.17+esm11
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  php7.0                          7.0.33-0ubuntu0.16.04.16+esm18
                                  Available with Ubuntu Pro
  php7.0-cgi                      7.0.33-0ubuntu0.16.04.16+esm18
                                  Available with Ubuntu Pro
  php7.0-cli                      7.0.33-0ubuntu0.16.04.16+esm18
                                  Available with Ubuntu Pro
  php7.0-common                   7.0.33-0ubuntu0.16.04.16+esm18
                                  Available with Ubuntu Pro
  php7.0-fpm                      7.0.33-0ubuntu0.16.04.16+esm18
                                  Available with Ubuntu Pro
  php7.0-pgsql                    7.0.33-0ubuntu0.16.04.16+esm18
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-7648-3

https://ubuntu.com/security/notices/USN-7648-2

https://ubuntu.com/security/notices/USN-7648-1

CVE-2025-1735, https://bugs.launchpad.net/ubuntu/+source/php7.4/+bug/2121643

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7648-3

Topics%20covered

Topics Covered

security advisory critical php DoS Ubuntu

Package Information

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here