CVE-2020-7059

Public Exploit
OOB read in php_strip_tags_ex

Description

When using fgetss() function to read data with stripping tags, in PHP versions 7.2.x below 7.2.27, 7.3.x below 7.3.14 and 7.4.x below 7.4.2 it is possible to supply data that will cause this function to read past the allocated buffer. This may lead to information disclosure or crash.

Remediation

Workaround:

  • Usage of fgetss() has been DEPRECATED as of PHP 7.3.0. Please use strip_tags() or other means sanitizing HTML code.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.88% Top 20%
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory php.net
Affected: PHP Group PHP
Published at:
Updated at:

References

Link Tags
https://seclists.org/bugtraq/2020/Feb/27 third party advisory mailing list
https://www.debian.org/security/2020/dsa-4626 third party advisory vendor advisory
https://usn.ubuntu.com/4279-1/ third party advisory patch vendor advisory
https://www.debian.org/security/2020/dsa-4628 third party advisory vendor advisory
https://seclists.org/bugtraq/2020/Feb/31 third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2020/02/msg00030.html third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00023.html third party advisory vendor advisory
https://security.gentoo.org/glsa/202003-57 third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpujul2020.html third party advisory
https://bugs.php.net/bug.php?id=79099 exploit vendor advisory
https://security.netapp.com/advisory/ntap-20200221-0002/ third party advisory
https://seclists.org/bugtraq/2021/Jan/3 third party advisory mailing list
https://www.oracle.com/security-alerts/cpuApr2021.html third party advisory
https://www.tenable.com/security/tns-2021-14 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2020-7059?
CVE-2020-7059 has been scored as a medium severity vulnerability.
How to fix CVE-2020-7059?
As a workaround for remediating CVE-2020-7059: Usage of fgetss() has been DEPRECATED as of PHP 7.3.0. Please use strip_tags() or other means sanitizing HTML code.
Is CVE-2020-7059 being actively exploited in the wild?
It is possible that CVE-2020-7059 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-7059?
CVE-2020-7059 affects PHP Group PHP.
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