Vulnerability in Php
CVE-2015-6838
The xsl_ext_function_php function in ext/xsl/xsltprocessor.c in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13, when libxml2 before 2.9.2 is used, does not consider the possibility of a NULL valuePop return value before proceeding with a free operation after the principal argument loop, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted XML document, a different vulnerability than CVE-2015-6837.
EPSS: 0.073 (93.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Php — versions 5.6.0, 5.6.1, 5.6.2
- Xmlsoft Libxml2
- N/a — versions n/a
Public proof-of-concept exploits
References
- security@opentext.com (vdb-entry, x_refsource_SECTRACK)
- security@opentext.com (x_refsource_CONFIRM)
- security@opentext.com (x_refsource_CONFIRM)
- security@opentext.com (vdb-entry, x_refsource_BID)
- security@opentext.com (vendor-advisory, x_refsource_DEBIAN)
- security@opentext.com (vendor-advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2015-6838?
- CVE-2015-6838 is a high-severity vulnerability in Php. CVSS score: 7.5/10. Published 2016-05-16.
- How severe is CVE-2015-6838?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2015-6838 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.