php php CVE-2020-7063 vulnerability in PHP and Other Products
Published on February 27, 2020

Files added to tar with Phar::buildFromIterator have all-access permissions

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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 creating PHAR archive using PharData::buildFromIterator() function, the files are added with default permissions (0666, or all access) even if the original files on the filesystem were with more restrictive permissions. This may result in files having more lax permissions than intended when such archive is extracted.

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Vulnerability Analysis

CVE-2020-7063 can be exploited with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
NONE
Availability Impact:
NONE

Weakness Type

Improper Preservation of Permissions

The software does not preserve permissions or incorrectly preserves permissions when copying, restoring, or sharing objects, which can cause them to have less restrictive permissions than intended.


Products Associated with CVE-2020-7063

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2020-7063 are published in these products:

PHP
 
Tenable Sc
 
Debian Linux
 
OpenSuse Leap
 

Affected Versions

PHP Group PHP:

Exploit Probability

EPSS
0.30%
Percentile
53.28%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.