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base64: out of bounds write

Moderate
victorjulien published GHSA-79vh-hpwq-3jh7 May 7, 2024

Package

suricata

Affected versions

>=6.0.0,<=6.0.18
>= 7.0.0,<=7.0.4

Patched versions

6.0.19
7.0.5

Description

Impact

Specially crafted traffic can cause a limited buffer overflow.

Specially crafted datasets can cause a limited buffer overflow.

Patches

Workarounds

  • Do not load untrusted datasets
  • Do not use rules with base64_decode keyword with bytes option with value 1, 2 or 5

For 7.0.x :

  • Set app-layer.protocols.smtp.mime.body-md5 to false

References

https://redmine.openinfosecfoundation.org/issues/6905 (7.0.x)
https://redmine.openinfosecfoundation.org/issues/6931 (6.0.x)

Credits

Evgeny Legerov of Kaspersky Lab.

Severity

Moderate

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
None
Integrity
None
Availability
Low

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:N/I:N/A:L

CVE ID

CVE-2024-32664

Weaknesses