Integer Overflow or Wraparound Affecting krb5 package, versions <1.15.3-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ALPINE318-KRB5-5512667
- published16 Jan 2018
- disclosed16 Jan 2018
Introduced: 16 Jan 2018
CVE-2018-5709 (opens in a new tab)How to fix?
Upgrade Alpine:3.18 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:3.18 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