Out-of-bounds read in PHP and Debian Linux - CVE-2019-11046

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Main Vulnerability Database Vulnerabilities #VU34944

Out-of-bounds read in PHP and Debian Linux - CVE-2019-11046

Published: December 23, 2019 / Updated: August 8, 2020


Vulnerability identifier: #VU34944
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-11046
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: PHP Group
Debian
Affected software:
PHP
Debian Linux

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0, PHP bcmath extension functions on some systems, including Windows, can be tricked into reading beyond the allocated space by supplying it with string containing characters that are identified as numeric by the OS but aren't ASCII numbers. This can read to disclosure of the content of some memory locations.


How to mitigate CVE-2019-11046

Install update from vendor's website.

Sources