Vulnerability in Php
CVE-2015-6835
The session deserializer in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 mishandles multiple php_var_unserialize calls, which allow remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted session content.
EPSS: 0.370 (98.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Php — versions 5.6.0, 5.6.1, 5.6.2
- N/a — versions n/a
Public proof-of-concept exploits
References
- security@opentext.com (vdb-entry, x_refsource_BID)
- security@opentext.com (x_refsource_CONFIRM)
- security@opentext.com (vdb-entry, x_refsource_SECTRACK)
- security@opentext.com (x_refsource_CONFIRM)
- security@opentext.com (vendor-advisory, x_refsource_DEBIAN)
- security@opentext.com (vendor-advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2015-6835?
- CVE-2015-6835 is a critical-severity vulnerability in Php. CVSS score: 9.8/10. Published 2016-05-16.
- How severe is CVE-2015-6835?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2015-6835 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.