Vulnerability identifier: #VU22477
Vulnerability risk: Medium
CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2019-9022
CWE-ID:
CWE-125
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
PHP
Universal components / Libraries /
Scripting languages
Vendor: PHP Group
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the php_parserr in ext/standard/dns.c when processing DNS_CAA and DNS_ANY responses. A remote attacker controlling a malicious DNS server can trigger out-of-bounds read error and read contents of memory on the system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
PHP: 7.1.0 - 7.1.25, 7.2.0 - 7.2.13, 7.3.0alpha1 - 7.3.1
External links
https://bugs.php.net/bug.php?id=77369
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.