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Potential buffer overflow in psd-tools

Critical severity GitHub Reviewed Published Mar 16, 2020 in psd-tools/psd-tools • Updated Sep 5, 2023

Package

pip psd-tools (pip)

Affected versions

>= 1.8.37, < 1.9.3

Patched versions

1.9.4

Description

Impact

An issue was discovered in psd-tools before 1.9.4. The Cython implementation of RLE decoding did not check for malformed PSD input data during decoding to the PIL.Image or NumPy format, leading to a Buffer Overflow.

Patches

Users of psd-tools version v1.8.37 to v1.9.3 should upgrade to v1.9.4.

Workarounds

Without Cython present on installation, buffer overflow does not occur but IndexError will be thrown. However, already installed psd-tools with Cython extention should be upgraded.

References

psd-tools/psd-tools#198

For more information

If you have any questions or comments about this advisory:

References

@kyamagu kyamagu published to psd-tools/psd-tools Mar 16, 2020
Reviewed Mar 16, 2020
Published to the GitHub Advisory Database Mar 16, 2020
Last updated Sep 5, 2023

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

0.235%
(62nd percentile)

Weaknesses

CVE ID

CVE-2020-10571

GHSA ID

GHSA-22jr-vc7j-g762

Source code

No known source code
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