CVE-2021-21826: Buffer Overflow
First published: Fri Aug 20 2021(Updated: )
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.
Credit: talos-cna@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Att Xmill | =0.7 |
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Frequently Asked Questions
What is CVE-2021-21826?
CVE-2021-21826 is a heap-based buffer overflow vulnerability in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7.
What is the severity of CVE-2021-21826?
CVE-2021-21826 has a severity rating of 9.8, which is considered critical.
Which software is affected by CVE-2021-21826?
AT&T Labs Xmill 0.7 is affected by CVE-2021-21826.
How does CVE-2021-21826 affect the software?
CVE-2021-21826 allows an attacker to cause a heap-based buffer overflow through the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7.
Is there a fix available for CVE-2021-21826?
At the moment, there is no known fix or patch available for CVE-2021-21826. It is recommended to follow the guidance provided by the vendor or CERT/CC.
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