Buffer overflow in PHP

CVE-2016-5114

sapi/fpm/fpm/fpm_log.c in PHP before 5.5.31, 5.6.x before 5.6.17, and 7.x before 7.0.2 misinterprets the semantics of the snprintf return value, which allows attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read and buffer overflow) via a long string, as demonstrated by a long URI in a configuration with custom REQUEST_URI logging.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.045 (91.1th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2016-5114: held from 0.045 to 0.045.

EPSS over last 30 days · oldest: 0.045 · newest: 0.045 · change: 0.000

Affected products

  • PHP — versions 5.6.0, 5.6.1, 5.6.2

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2016-5114?
CVE-2016-5114 is a critical-severity vulnerability in PHP, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.1/10. Published 2016-08-07.
How severe is CVE-2016-5114?
Critical severity. CVSS v3 base score is 9.1 out of 10.