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CVE-2015-0231 is a use-after-free vulnerability in PHP's unserialization implementation, specifically the processing of nested serialized data in the standard extension. A crafted serialized object containing duplicate numeric property keys can cause improper object cleanup while a subsequent serialized reference retains access to the freed object. The resulting dangling reference can corrupt PHP memory management structures. The issue is an incomplete fix for CVE-2014-8142 and affects PHP releases before 5.4.37, 5.5.21, and 5.6.5.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed in HP Matrix Operating Environment 7.5.0.
Remote denial-of-service vulnerability affecting HP System Management Homepage (SMH).
A PHP use-after-free vulnerability affecting the HP-UX Apache Web Server Suite. The bulletin assigns a CVSS v2 base score of 7.5.
A PHP unserialize use-after-free vulnerability that can be exploited by forging zval objects to obtain arbitrary memory read and write primitives. The described exploit redirects a GOT entry for rename to popen, enabling local command execution; the author also discusses remote exploitation challenges involving ASLR, PIE, and Apache-loaded libphp.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.