Buffer overflow in Att Xmill

CVE-2021-21812

A stack-based buffer overflow vulnerability exists in the command-line-parsing HandleFileArg functionality of AT&T Labs’ Xmill 0.7. Within the function HandleFileArg the argument filepattern is under control of the user who passes it in from the command line. filepattern is passed directly to strcpy copying the path provided by the user into a static sized buffer without any length checks resulting in a stack-buffer overflow. An attacker can provide malicious input to trigger these vulnerabilities.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (24.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.0% 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-2021-21812: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · 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-2021-21812?
CVE-2021-21812 is a high-severity vulnerability in Att Xmill, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-08-13.
How severe is CVE-2021-21812?
High severity. CVSS v3 base score is 7.8 out of 10.