CVE-2021-21811 Memory corruption in AT&T
A heap buffer overflow in Xmill's XML parser allows attackers to execute arbitrary code or cause denial of service via a malicious XML 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-2021-21811?
CVE-2021-21811 is a high-severity memory corruption vulnerability in AT&T, published on 31 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-191
Which versions are affected by CVE-2021-21811?
It affects 1 product.
Products include Att Xmill.
How do I fix CVE-2021-21811?
No fix has been published for CVE-2021-21811 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-2021-21811 being exploited?
There is no known exploitation of CVE-2021-21811 in the wild and no public exploit code.
Other vulnerabilities in AT&T
Sources
Also known as GHSA-fmqr-7vvj-9r72.