CVE-2021-27646 Use after free in Synology DiskStation Manager (DSM)
Remote attackers can execute arbitrary code on Synology NAS devices via crafted web requests exploiting a use-after-free flaw.
- 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-2021-27646?
CVE-2021-27646 is a critical use after free vulnerability in Synology Diskstation Manager, published on 12 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.
Weakness: CWE-416
Which versions are affected by CVE-2021-27646?
It affects 1 product.
Products include Synology Diskstation Manager.
How do I fix CVE-2021-27646?
No fix has been published for CVE-2021-27646 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2021-27646 being exploited?
There is no known exploitation of CVE-2021-27646 in the wild and no public exploit code.
Other vulnerabilities in Synology Diskstation Manager
Sources
Also known as GHSA-qm39-44mj-vqvq.