CVE-2017-8923
PHP Zend String Buffer Overflow Denial of Service Vulnerability
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.
INFO
Published Date :
May 12, 2017, 8:29 p.m.
Last Modified :
July 20, 2022, 4:32 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-8923.
| URL | Resource |
|---|---|
| http://www.securityfocus.com/bid/98518 | Third Party Advisory VDB Entry |
| https://bugs.php.net/bug.php?id=74577 | Exploit Issue Tracking Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-8923 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-8923 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Jul. 20, 2022
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Removed CWE NIST CWE-20 Added CWE NIST CWE-787 Changed CPE Configuration OR *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions up to (including) 7.1.5 OR *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions up to (excluding) 7.4.24 *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.11 -
Modified Analysis by [email protected]
Apr. 16, 2019
Action Type Old Value New Value Changed Reference Type http://www.securityfocus.com/bid/98518 No Types Assigned http://www.securityfocus.com/bid/98518 Third Party Advisory, VDB Entry Changed Reference Type https://bugs.php.net/bug.php?id=74577 Patch https://bugs.php.net/bug.php?id=74577 Exploit, Issue Tracking, Vendor Advisory -
CVE Modified by [email protected]
May. 25, 2017
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/98518 [No Types Assigned] -
Initial Analysis by [email protected]
May. 23, 2017
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://bugs.php.net/bug.php?id=74577 No Types Assigned https://bugs.php.net/bug.php?id=74577 Patch Added CWE CWE-20 Added CPE Configuration OR *cpe:2.3:a:php:php:7.1.5:*:*:*:*:*:*:* (and previous)
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-8923 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-8923
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.54 }} 0.18%
score
0.73903
percentile