CVE-2017-8923
Published: 12 May 2017
The zend_string_extend function in Zend/zend_string.h in PHP through 7.1.5 does not prevent changes to string objects that result in a negative length, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging a script's use of .= with a long string.
Notes
Author | Note |
---|---|
leosilva | unfixed upstream as of 2020-06-23 |
rodrigo-zaiden | php7.0 retriage on 2022-02-01 found that upstream fixed it on 2021-08-18, information is now updated to reflect this. |
Priority
Status
Package | Release | Status |
---|---|---|
php5 Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Needed
|
|
upstream |
Not vulnerable
|
|
xenial |
Does not exist
|
|
yakkety |
Does not exist
|
|
zesty |
Does not exist
|
|
php7.0 Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needed
|
|
xenial |
Released
(7.0.33-0ubuntu0.16.04.16+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
yakkety |
Ignored
(end of life)
|
|
zesty |
Ignored
(end of life)
|
|
Patches: upstream: https://github.com/php/php-src/commit/0b7dffb41f0b571c00304c973f9b85ef910d43d9 |
||
php7.2 Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(7.2.24-0ubuntu0.18.04.11)
|
|
cosmic |
Ignored
(end of life)
|
|
disco |
Ignored
(end of life)
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
php7.4 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Released
(7.4.3-4ubuntu2.10)
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
php8.0 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
impish |
Released
(8.0.8-1ubuntu0.3)
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
php8.1 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Not vulnerable
(8.1.0-1)
|
|
kinetic |
Not vulnerable
(8.1.0-1)
|
|
lunar |
Not vulnerable
(8.1.0-1)
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 9.8 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |