#VU34944 Out-of-bounds read in PHP and Debian Linux - CVE-2019-11046
Vulnerability identifier: #VU34944
Vulnerability risk: Medium
CVSSv4.0: 6.6 [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:
CWE-ID:
CWE-125
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
PHP
Universal components / Libraries /
Scripting languages
Debian Linux
Operating systems & Components /
Operating system
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.
Mitigation
Install update from vendor's website.
Vulnerable software versions
PHP: 7.4.0
Debian Linux: 7.4.0 - 8.0
External links
https://lists.opensuse.org/opensuse-security-announce/2020-01/msg00036.html
https://bugs.php.net/bug.php?id=78878
https://lists.debian.org/debian-lts-announce/2019/12/msg00034.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
https://seclists.org/bugtraq/2020/Feb/27
https://seclists.org/bugtraq/2020/Feb/31
https://security.netapp.com/advisory/ntap-20200103-0002/
https://support.f5.com/csp/article/K48866433?utm_source=f5support&utm_medium=RSS
https://usn.ubuntu.com/4239-1/
https://www.debian.org/security/2020/dsa-4626
https://www.debian.org/security/2020/dsa-4628
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
