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ubuntucveUbuntu.comUB:CVE-2017-8923
HistoryMay 12, 2017 - 12:00 a.m.

CVE-2017-8923

2017-05-1200:00:00
ubuntu.com
ubuntu.com
23

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.005 Low

EPSS

Percentile

77.4%

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.

Bugs

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.
OSVersionArchitecturePackageVersionFilename
ubuntu14.04noarchphp5< anyUNKNOWN
ubuntu16.04noarchphp7.0< 7.0.33-0ubuntu0.16.04.16+esm3UNKNOWN
ubuntu18.04noarchphp7.2< 7.2.24-0ubuntu0.18.04.11UNKNOWN
ubuntu20.04noarchphp7.4< 7.4.3-4ubuntu2.10UNKNOWN
ubuntu21.10noarchphp8.0< 8.0.8-1ubuntu0.3UNKNOWN

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

0.005 Low

EPSS

Percentile

77.4%