CVE-2019-11046

Buffer underflow in bc_shift_addsub

Description

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.

Category

3.7
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 10.44% Top 10%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory debian.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=78878 patch vendor advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/12/msg00034.html third party advisory mailing list
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://support.f5.com/csp/article/K48866433?utm_source=f5support&%3Butm_medium=RSS
https://usn.ubuntu.com/4239-1/ third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00036.html third party advisory 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.debian.org/security/2020/dsa-4628 third party advisory vendor advisory
https://seclists.org/bugtraq/2020/Feb/31 third party advisory mailing list
https://seclists.org/bugtraq/2021/Jan/3 third party advisory mailing list
https://www.tenable.com/security/tns-2021-14 third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-11046?
CVE-2019-11046 has been scored as a low severity vulnerability.
How to fix CVE-2019-11046?
To fix CVE-2019-11046, 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-2019-11046 being actively exploited in the wild?
It is possible that CVE-2019-11046 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~10% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-11046?
CVE-2019-11046 affects PHP Group PHP.
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