CVE-2018-19935

Publication date 7 December 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

ext/imap/php_imap.c in PHP 5.x and 7.x before 7.3.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty string in the message argument to the imap_mail function.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
php-imap	18.10 cosmic	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Fixed 5.4.6-0ubuntu5.1
php5	18.10 cosmic	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not affected
php7.0	18.10 cosmic	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Fixed 7.0.33-0ubuntu0.16.04.1
	14.04 LTS trusty	Not in release
php7.2	18.10 cosmic	Fixed 7.2.15-0ubuntu0.18.20.1
	18.04 LTS bionic	Fixed 7.2.15-0ubuntu0.18.04.1
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
php7.3	18.10 cosmic	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Notes

mdeslaur

php5 in precise and trusty doesn't build imap, it is in a separate php-imap source package.

Patch details

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

Package	Patch details
php7.3	Upstream: https://git.php.net/?p=php-src.git;a=commit;h=648fc1e369fc05fb9200a42c7938912236b2a318

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

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

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

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

References

Other references

https://www.cve.org/CVERecord?id=CVE-2018-19935