CVE-2021-21811 — CRITICAL (9.8)

Vulnerability Description

A memory corruption vulnerability exists in the XML-parsing CreateLabelOrAttrib functionality of AT&T Labs’ Xmill 0.7. A specially crafted XML file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Att	Xmill	0.7

Related Weaknesses (CWE)

CWE-191

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1279ExploitThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1279ExploitThird Party Advisory

FAQ

What is CVE-2021-21811?

CVE-2021-21811 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A memory corruption vulnerability exists in the XML-parsing CreateLabelOrAttrib functionality of AT&T Labs’ Xmill 0.7. A specially crafted XML file can lead to a heap buffer overflow. An attacker can ...

How severe is CVE-2021-21811?

CVE-2021-21811 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-21811?

Check the references section above for vendor advisories and patch information. Affected products include: Att Xmill.