IM
IronMonkey Threat Research

CVE-2021-21826 CRITICAL

Published: 2021-08-20 | Last Modified: 2024-11-21 | Status: Modified

Description

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.

Additional Descriptions (1)

Se presenta una vulnerabilidad de desbordamiento de búfer en la región heap de la memoria en la funcionalidad XML Decompression DecodeTreeBlock de AT&T Labs Xmill versión 0.7. Dentro de "DecodeTreeBlock" que es llamado durante la descompresión de un archivo XMI, un UINT32 es cargado desde el archivo y es usado como entrada confiable como la longitud de un búfer. Un atacante puede proporcionar un archivo malicioso para desencadenar esta vulnerabilidad.

CVSS Metrics

Base Score: 9.8 (CRITICAL)

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

Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactHIGH
Integrity ImpactHIGH
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 3.9

Impact Score: 5.9

Base Score: 7.5 (HIGH)

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

Access VectorNETWORK
Access ComplexityLOW
AuthenticationNONE
Confidentiality ImpactPARTIAL
Integrity ImpactPARTIAL
Availability ImpactPARTIAL

Source: [email protected]

Type: Primary

Exploitability Score: 10.0

Impact Score: 6.4

Weaknesses

Source Type Description
[email protected] Secondary
en CWE-120
[email protected] Primary
en CWE-787

Affected Products

Vendor Product Version Update Type
att xmill 0.7 <built-in method update of dict object at 0x7e61109d6640> Application

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:att:xmill:0.7:*:*:*:*:*:*:*

References

Notification
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