mit kerberos-5 CVE-2020-28196 vulnerability in MIT and Other Products
Published on November 6, 2020

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MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit.

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Vulnerability Analysis

CVE-2020-28196 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

What is a Stack Exhaustion Vulnerability?

The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.

CVE-2020-28196 has been classified to as a Stack Exhaustion vulnerability or weakness.


Products Associated with CVE-2020-28196

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Exploit Probability

EPSS
0.38%
Percentile
58.80%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.