CVE-2020-7062: In PHP versions 7.2.x below 7.2.28, 7.3.x below 7.3.15 and 7.4.x below 7.4.3, when using file upload functionality, if upload progress tracking is enabled, but…

Description

In PHP versions 7.2.x below 7.2.28, 7.3.x below 7.3.15 and 7.4.x below 7.4.3, when using file upload functionality, if upload progress tracking is enabled, but session.upload_progress.cleanup is set to 0 (disabled), and the file upload fails, the upload procedure would try to clean up data that does not exist and encounter null pointer dereference, which would likely lead to a crash.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)3.6% · higher than 89% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

PH

PHP · PHP

7.2.0 through 7.2.27; 7.3.0 through 7.3.14; 7.4.0 through 7.4.2 · source: NVD

DL

Debian Linux · Debian

8.0; 9.0; 10.0 · source: NVD

LE

Leap · Opensuse

15.1 · source: NVD

UL

Ubuntu Linux · Canonical

12.04; 14.04; 16.04; 18.04; 19.10 · source: NVD