Skip to content
Fencer Vulns
medium 4.6

CVE-2007-1484 json

The array_user_key_compare function in PHP 4.4.6 and earlier, and 5.x up to 5.2.1, makes erroneous calls to zval_dtor, which triggers memor…

published 2007-03-16 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-1478

cvss
4.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
1
Exploit-DB

Summary

The array_user_key_compare function in PHP 4.4.6 and earlier, and 5.x up to 5.2.1, makes erroneous calls to zval_dtor, which triggers memory corruption and allows local users to bypass safe_mode and execute arbitrary code via a certain unset operation after array_user_key_compare has been called.

Timeline

  1. First public exploit (EDB-3499)
  2. Published

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-3499 PHP 4.4.6/5.2.1 - 'array_user_key_compare()' ZVAL dtor Local Overflow local, 2007-03-16
  • php-security.org http://www.php-security.org/MOPB/MOPB-24-2007.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.