Critical severity · published Aug 31, 2021
CVE-2021-21811
A memory corruption vulnerability exists in the XML-parsing CreateLabelOrAttrib functionality of AT&T Labs’ Xmill 0.7
9.8
CVSS
1.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XM
Xmill · Att
0.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-21811
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-21811
Exploit
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1279
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