CVE-2017-7189

Published: 10 July 2019

main/streams/xp_socket.c in PHP 7.x before 2017-03-07 misparses fsockopen calls, such as by interpreting fsockopen('127.0.0.1:80', 443) as if the address/port were 127.0.0.1:80:443, which is later truncated to 127.0.0.1:80. This behavior has a security risk if the explicitly provided port number (i.e., 443 in this example) is hardcoded into an application as a security policy, but the hostname argument (i.e., 127.0.0.1:80 in this example) is obtained from untrusted input.

Notes

the commit for this was later reverted as it introduced a
regression. As of 2020-06-23, there is no upstream fix.

As of 2022-02-04, there is still no upstream fix.

Status

Severity score breakdown

References

• https://www.cve.org/CVERecord?id=CVE-2017-7189
• NVD
• Launchpad
• Debian

Bugs

• https://bugs.php.net/bug.php?id=74192 (private)
• https://bugs.php.net/bug.php?id=74429
• https://bugzilla.suse.com/show_bug.cgi?id=CVE-2017-7189