[SECURITY] [DLA 3810-1] php7.3 security update

Debian LTS Advisory DLA-3810-1 [email protected]
https://www.debian.org/lts/security/ Guilhem Moulin
May 07, 2024 https://wiki.debian.org/LTS

Package : php7.3
Version : 7.3.31-1~deb10u6
CVE ID : CVE-2024-2756 CVE-2024-3096

Security issues were found in PHP, a widely-used open source general
purpose scripting language, which could result in information disclosure
or incorrect validation of password hashes.

CVE-2024-2756

Marco Squarcina discovered that network and same-site attackers can
set a standard insecure cookie in the victim's browser which is
treated as a `__Host-` or `__Secure-` cookie by PHP applications.

This issue stems from an incomplete fix to CVE-2022-31629.

CVE-2024-3096

Eric Stern discovered that if a password stored with password_hash()
starts with a null byte (\x00), testing a blank string as the
password via password_verify() incorrectly returns true.

If a user were able to create a password with a leading null byte
(unlikely, but syntactically valid), the issue would allow an
attacker to trivially compromise the victim's account by attempting
to sign in with a blank string.

For Debian 10 buster, these problems have been fixed in version
7.3.31-1~deb10u6.

We recommend that you upgrade your php7.3 packages.

For the detailed security status of php7.3 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/php7.3

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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