CVE-2021-39392 Deserialization in n/a
Remote attackers can execute arbitrary code in MyLittleBackup by exploiting a hardcoded machine key to send serialized ASP code.
- 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-2021-39392?
CVE-2021-39392 is a critical unsafe deserialization vulnerability in n/a, published on 15 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The management tool in MyLittleBackup up to and including 1.7 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.
Weakness: CWE-502
Which versions are affected by CVE-2021-39392?
It affects 1 product.
Products include Mylittletools Mylittlebackup.
How do I fix CVE-2021-39392?
No fix has been published for CVE-2021-39392 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2021-39392 being exploited?
There is no known exploitation of CVE-2021-39392 in the wild and no public exploit code.
Sources
Also known as GHSA-r69j-r7vf-pfx7.