What is CVE-1999-0101?

CVE-1999-0101 is a vulnerability in IBM Aix. Published 1996-12-10.

Is CVE-1999-0101 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in IBM Aix

CVE-1999-0101

Buffer overflow in AIX and Solaris "gethostbyname" library call allows root access through corrupt DNS host names.

Published 1996-12-10 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 10.0 (High). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.078 (94.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.078 · newest: 0.078 · change: 0.000

Affected products

IBM Aix — versions 3.2, 4.1, 4.2

Public proof-of-concept exploits

References

ciac.llnl.gov/ciac/bulletins/h-13.shtml (government-resource, Vendor Advisory, third-party-advisory)

Frequently asked questions

What is CVE-1999-0101?: CVE-1999-0101 is a vulnerability in IBM Aix. Published 1996-12-10.
Is CVE-1999-0101 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.