CVE-2016-5770

Publication date 7 August 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Integer overflow in the SplFileObject::fread function in spl_directory.c in the SPL extension in PHP before 5.5.37 and 5.6.x before 5.6.23 allows remote attackers to cause a denial of service or possibly have unspecified other impact via a large integer argument, a related issue to CVE-2016-5096.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
php5	16.04 LTS xenial	Not in release
	15.10 wily	Ignored end of life
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Not affected
php7.0	16.04 LTS xenial	Not affected
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release

Notes

seth-arnold

I think the length == INT_MAX case was overlooked. I added a comment to the bug.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
php5	Upstream: http://git.php.net/?p=php-src.git;a=commit;h=7245bff300d3fa8bacbef7897ff080a6f1c23eba

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	9.8 · Critical
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Other references

https://www.cve.org/CVERecord?id=CVE-2016-5770