CVE-2017-8923

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Source
https://cve.org/CVERecord?id=CVE-2017-8923
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-8923.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2017-8923
Downstream
Related
Published
2017-05-12T20:29:00.500Z
Modified
2026-04-11T15:15:48.000415Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

The zendstringextend 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.

References

Affected packages

Git / github.com/php/php-src

Affected ranges

Type
GIT
Repo
https://github.com/php/php-src
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7d959d16546198e8012985109e5689abcae18b5f
Introduced
5dc92c2117cafc61daaaaa240fd46c3ac33872a4
Fixed
ca647c529295a4fde269e9a4dfa19fc4f245501c
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "7.4.24"
        },
        {
            "introduced": "8.0.0"
        },
        {
            "fixed": "8.0.11"
        }
    ],
    "cpe": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*",
    "source": "CPE_FIELD"
}

Affected versions

Other
POST_64BIT_BRANCH_MERGE
POST_AST_MERGE
POST_PHP7_NSAPI_REMOVAL
POST_PHP7_REMOVALS
POST_PHPNG_MERGE
PRE_64BIT_BRANCH_MERGE
PRE_AST_MERGE
PRE_PHP7_EREG_MYSQL_REMOVALS
PRE_PHP7_NSAPI_REMOVAL
PRE_PHP7_REMOVALS

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-8923.json"