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Arbitrary Code Execution in Cookie Serialization

High severity GitHub Reviewed Published Apr 12, 2022 to the GitHub Advisory Database • Updated Jan 11, 2023

Package

erlang plug (Erlang)

Affected versions

< 1.0.4
>= 1.1.0, < 1.1.7
>= 1.2.0, < 1.2.3
>= 1.3.0, < 1.3.2

Patched versions

1.0.4
1.1.7
1.2.3
1.3.2

Description

The default serialization used by Plug session may result in code execution
in certain situations. Keep in mind, however, the session cookie is signed
and this attack can only be exploited if the attacker has access to your
secret key as well as your signing/encryption salts. We recommend users to
change their secret key base and salts if they suspect they have been leaked,
regardless of this vulnerability.

References

Published to the GitHub Advisory Database Apr 12, 2022
Reviewed Apr 12, 2022
Last updated Jan 11, 2023

Severity

High

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
High
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:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.251%
(65th percentile)

Weaknesses

CVE ID

CVE-2017-1000053

GHSA ID

GHSA-5v4m-c73v-c7gq

Source code

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