Vulnerability · Published Aug 13, 2021 · Assigned by talos

CVE-2021-21815

High 7.8

In plain English

A high-severity security flaw in AT&T. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.0)7.8High

Exploit odds (30 days)0.3%top 73.3% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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 staticly sized buffer without any length checks resulting in a stack-buffer overflow. An attacker can provide malicious input to trigger this vulnerability.

Affected products (as reported)

Vendor	Product	Versions
n/a	AT&T	AT&T Labs Xmill 0.7

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1280 x_refsource_MISC