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Integer Overflow or Wraparound Affecting krb5 package, versions <1.15.3-r0

Severity

 Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    0.1% (41st percentile)

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  • Snyk ID SNYK-ALPINE310-KRB5-453821
  • published 16 Jan 2018
  • disclosed 16 Jan 2018
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Introduced: 16 Jan 2018

CVE-2018-5709 Open this link in a new tab
CWE-190 Open this link in a new tab

How to fix?

Upgrade Alpine:3.10 krb5 to version 1.15.3-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5 package and not the krb5 package as distributed by Alpine. See How to fix? for Alpine:3.10 relevant fixed versions and status.

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. There is a variable "dbentry->n_key_data" in kadmin/dbutil/dump.c that can store 16-bit data but unknowingly the developer has assigned a "u4" variable to it, which is for 32-bit data. An attacker can use this vulnerability to affect other artifacts of the database as we know that a Kerberos database dump file contains trusted data.