CVE-2017-8923

Published: May 12, 2017Modified: May 13, 2026

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

The zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string.

Affected (2)

Products: Php: Php

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Php Php	Before 7.4.24
Php Php	From 8.0.0 to 8.0.11

Related CWEs

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

References (5)

http://www.securityfocus.com/bid/98518

Source: cve@mitre.org

Third Party AdvisoryVDB Entry

https://bugs.php.net/bug.php?id=74577

Source: cve@mitre.org

ExploitIssue TrackingVendor Advisory

http://www.securityfocus.com/bid/98518

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party AdvisoryVDB Entry

https://bugs.php.net/bug.php?id=74577

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue TrackingVendor Advisory

https://security.netapp.com/advisory/ntap-20241227-0007/

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.