Buffer overflow in Att Xmill

CVE-2021-21830

A heap-based buffer overflow vulnerability exists in the XML Decompression LabelDict::Load functionality of AT&T Labs’ Xmill 0.7. A specially crafted XMI file can lead to remote code execution. An attacker can provide a malicious file to trigger this vulnerability.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.4th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-21830: held from 0.023 to 0.023.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

  • Att Xmill — versions 0.7
  • AT&T — versions AT&T Labs Xmill 0.7

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-21830?
CVE-2021-21830 is a critical-severity vulnerability in Att Xmill, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2021-08-13.
How severe is CVE-2021-21830?
Critical severity. CVSS v3 base score is 9.8 out of 10.