CVE-2017-8923
moderate-risk
Published 2017-05-12
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.
Do I need to act?
~
4.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
+
Fix available
Upgrade to: 7d959d16546198e8012985109e5689abcae18b5f, ca647c529295a4fde269e9a4dfa19fc4f245501c
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (5)
Third Party Advisory
http://www.securityfocus.com/bid/98518
Third Party Advisory
http://www.securityfocus.com/bid/98518
45
/ 100
moderate-risk
Severity
32/34 · Critical
Exploitability
8/34 · Low
Exposure
5/34 · Minimal