CVE-2021-21827

A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7. Within `DecodeTreeBlock` which is called during the decompression of an XMI file, a UINT32 is loaded from the file and used as trusted input as the length of a buffer. An attacker can provide a malicious file to trigger this vulnerability.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1291	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:att:xmill:0.7:*:*:*:*:*:*:*

History

26 Aug 2021, 16:01

Type	Values Removed	Values Added
CWE		CWE-787
CPE		cpe:2.3:a:att:xmill:0.7:::::::*
References	~~(MISC) https://talosintelligence.com/vulnerability_reports/TALOS-2021-1291 -~~	(MISC) https://talosintelligence.com/vulnerability_reports/TALOS-2021-1291 - Exploit, Third Party Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 7.5 v3 : 9.8

20 Aug 2021, 22:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-08-20 22:15

Updated : 2023-12-10 13:55

NVD link : CVE-2021-21827

Mitre link : CVE-2021-21827

CVE.ORG link : CVE-2021-21827

JSON object : View

Products Affected

att

xmill

CWE

CWE-787

Out-of-bounds Write

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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