Integer signedness error in the dynamicGetbuf function in gd_io_dp.c in the GD Graphics Library (aka libgd) through 2.2.3, as used in PHP before 5.6.28 and 7.x before 7.0.13, allows remote attackers to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact via a crafted imagecreatefromstring call.
Published 2017-01-04 20:59:00
Updated 2017-11-04 01:29:25
View at NVD,   CVE.org
Vulnerability category: OverflowDenial of service

Products affected by CVE-2016-8670

  • Libgd » Libgd
    Versions up to, including, (<=) 2.2.3
    cpe:2.3:a:libgd:libgd:*:*:*:*:*:*:*:*
    When used together with: PHP » PHP
    When used together with: PHP » PHP » Version: 7.0.0
    When used together with: PHP » PHP » Version: 7.0.1
    When used together with: PHP » PHP » Version: 7.0.2
    When used together with: PHP » PHP » Version: 7.0.3
    When used together with: PHP » PHP » Version: 7.0.4
    When used together with: PHP » PHP » Version: 7.0.5
    When used together with: PHP » PHP » Version: 7.0.6
    When used together with: PHP » PHP » Version: 7.0.7
    When used together with: PHP » PHP » Version: 7.0.8
    When used together with: PHP » PHP » Version: 7.0.9
    When used together with: PHP » PHP » Version: 7.0.10
    When used together with: PHP » PHP » Version: 7.0.11
    When used together with: PHP » PHP » Version: 7.0.12

Exploit prediction scoring system (EPSS) score for CVE-2016-8670

4.71%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 93 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2016-8670

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
NIST
9.8
CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
NIST

CWE ids for CVE-2016-8670

  • The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2016-8670

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