CVE-2019-11049

mail() may release string with refcount==1 twice

Description

In PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can result in double-freeing certain memory locations.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 3.52% Top 15%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory php.net
Affected: PHP Group PHP
Published at:
Updated at:

References

Link Tags
https://bugs.php.net/bug.php?id=78943 mailing list patch vendor advisory
https://security.netapp.com/advisory/ntap-20200103-0002/ third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/ vendor advisory
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://www.tenable.com/security/tns-2021-14 third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-11049?
CVE-2019-11049 has been scored as a medium severity vulnerability.
How to fix CVE-2019-11049?
To fix CVE-2019-11049, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11049 being actively exploited in the wild?
It is possible that CVE-2019-11049 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-11049?
CVE-2019-11049 affects PHP Group PHP.
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