Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2019-12420

Uncontrolled Resource Consumption

Published: Dec 12, 2019 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2019-12420
CWEhttps://cwe.mitre.org/data/definitions/400.html

In Apache SpamAssassin before 3.4.3, a message can be crafted in a way to use excessive resources. Upgrading to SA 3.4.3 as soon as possible is the recommended fix but details will not be shared publicly.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

NameVendorStart VersionEnd Version
SpamassassinApache*3.4.3 (excluding)
Red Hat Enterprise Linux 7RedHatspamassassin-0:3.4.0-6.el7*
Red Hat Enterprise Linux 8RedHatspamassassin-0:3.4.2-10.el8*
SpamassassinUbuntubionic*
SpamassassinUbuntudisco*
SpamassassinUbuntueoan*
SpamassassinUbuntuesm-infra-legacy/trusty*
SpamassassinUbuntuesm-infra/bionic*
SpamassassinUbuntuesm-infra/xenial*
SpamassassinUbuntutrusty*
SpamassassinUbuntutrusty/esm*
SpamassassinUbuntuupstream*
SpamassassinUbuntuxenial*

Potential Mitigations

  • Mitigation of resource exhaustion attacks requires that the target system either:

  • The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

  • The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

References

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