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Symfony Unsafe Cache Serialization Could Enable RCE

Critical severity GitHub Reviewed Published Dec 2, 2019 to the GitHub Advisory Database • Updated Feb 1, 2024

Package

composer symfony/cache (Composer)

Affected versions

>= 3.1.0, < 3.4.35
>= 4.0.0, < 4.2.12
>= 4.3.0, < 4.3.8

Patched versions

3.4.35
4.2.12
4.3.8
composer symfony/symfony (Composer)
>= 3.1.0, < 3.4.35
>= 4.0.0, < 4.2.12
>= 4.3.0, < 4.3.8
3.4.35
4.2.12
4.3.8

Description

An issue was discovered in Symfony 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. Serializing certain cache adapter interfaces could result in remote code injection. This is related to symfony/cache.

References

Published by the National Vulnerability Database Nov 21, 2019
Reviewed Dec 1, 2019
Published to the GitHub Advisory Database Dec 2, 2019
Last updated Feb 1, 2024

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

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

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.610%
(79th percentile)

Weaknesses

CVE ID

CVE-2019-18889

GHSA ID

GHSA-79gr-58r3-pwm3

Source code

No known source code
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