CVE-2021-21828 Memory corruption in AT&T
A heap-based buffer overflow in Xmill allows attackers to execute arbitrary code or cause denial of service via a malicious file.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21828?
CVE-2021-21828 is a high-severity memory corruption vulnerability in AT&T, published on 20 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A heap-based buffer overflow vulnerability exists in the XML Decompression DecodeTreeBlock functionality of AT&T Labs Xmill 0.7. In the default case of DecodeTreeBlock a label is created via CurPath::AddLabel in order to track the label for later reference. An attacker can provide a malicious file to trigger this vulnerability.
Which versions are affected by CVE-2021-21828?
It affects 1 product.
Products include Att Xmill.
How do I fix CVE-2021-21828?
No fix has been published for CVE-2021-21828 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-21828 being exploited?
There is no known exploitation of CVE-2021-21828 in the wild and no public exploit code.
Other vulnerabilities in AT&T
Sources
Also known as GHSA-4w6g-h3j2-26jm.