A AegiFlow
CRITICALCVSS 9.8

CVE-2017-8923

CVE-2017-8923 updated by NVD

Modified
2026-09-20
Sources
nvd

Summary

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 packages

EcosystemPackageAffected versionsFixed versions
PHPphp[object Object], [object Object]

References

Includes data from the National Vulnerability Database (NIST). NVD data is in the public domain; this page is not endorsed by NIST.

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