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CVE-2017-8923

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published5/12/2017

Last Modified4/20/2025

Sourcenvd

Honeypot Sightings0

Affected Products

php:php

Weaknesses (CWE)

CWE-787

References

http://www.securityfocus.com/bid/98518(cve@mitre.org)

https://bugs.php.net/bug.php?id=74577(cve@mitre.org)

http://www.securityfocus.com/bid/98518(af854a3a-2127-422b-91ae-364da2661108)

https://bugs.php.net/bug.php?id=74577(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20241227-0007/(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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