CVE-2021-21813 Memory corruption in AT&T
A stack buffer overflow in AT&T software allows attackers to execute arbitrary code or cause denial of service via a crafted command-line argument.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21813?
CVE-2021-21813 is a high-severity memory corruption vulnerability in AT&T, published on 13 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Within the function HandleFileArg the argument filepattern is under control of the user who passes it in from the command line. filepattern is passed directly to memcpy copying the path provided by the user into a staticly sized buffer without any length checks resulting in a stack-buffer overflow.
Weakness: CWE-787
Which versions are affected by CVE-2021-21813?
It affects 1 product.
Products include Att Xmill.
How do I fix CVE-2021-21813?
No fix has been published for CVE-2021-21813 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-2021-21813 being exploited?
There is no known exploitation of CVE-2021-21813 in the wild and no public exploit code.
Other vulnerabilities in AT&T
Sources
Also known as GHSA-h458-372j-6g45.