Uncontrolled Recursion

Affecting krb5 package, versions <1.13.2+dfsg-5ubuntu2.2

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Overview

Affected versions of this package are vulnerable to Uncontrolled Recursion. 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.

Remediation

Upgrade krb5 to version or higher.

References

CVSS Score

7.5
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    Low
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    None
  • Availability
    High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE
CVE-2020-28196
CWE
CWE-674
Snyk ID
SNYK-UBUNTU1604-KRB5-1038548
Disclosed
06 Nov, 2020
Published
10 Nov, 2020