CVE-2021-27647 Memory corruption in Synology DiskStation Manager (DSM)
Remote attackers can execute arbitrary code on Synology NAS devices via crafted web requests exploiting an out-of-bounds read in the iSCSI snapshot communication core.
- 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-2021-27647?
CVE-2021-27647 is a critical memory corruption 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
Out-of-bounds Read 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-125
Which versions are affected by CVE-2021-27647?
It affects 1 product.
Products include Synology Diskstation Manager.
How do I fix CVE-2021-27647?
No fix has been published for CVE-2021-27647 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-2021-27647 being exploited?
There is no known exploitation of CVE-2021-27647 in the wild and no public exploit code.
Other vulnerabilities in Synology Diskstation Manager
Sources
Also known as GHSA-vwc7-rhxw-hppq.