Integer Overflow or Wraparound Affecting krb5 package, versions <1.15.3-r0
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Test your applications- Snyk ID SNYK-ALPINE310-KRB5-453821
- published 16 Jan 2018
- disclosed 16 Jan 2018
Introduced: 16 Jan 2018
CVE-2018-5709 Open this link in a new tabHow 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.
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5709
- https://security-tracker.debian.org/tracker/CVE-2018-5709
- https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Integer%20Overflow
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-5709
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E