CVE-2020-0688 Microsoft Exchange Server Validation Key Remote Code Execution
Attackers can execute arbitrary code remotely on Microsoft Exchange Server due to improper memory handling.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-0688?
CVE-2020-0688 is a high-severity memory corruption vulnerability in Microsoft Exchange Server, published on 11 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory, aka 'Microsoft Exchange Memory Corruption Vulnerability'.
Weakness: CWE-287
Which versions are affected by CVE-2020-0688?
It affects 1 product.
Products include Microsoft Exchange Server.
How do I fix CVE-2020-0688?
No fix has been published for CVE-2020-0688 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-0688 being exploited?
Yes. Attackers have exploited CVE-2020-0688 in the wild since at least 3 Nov 2021, including in ransomware campaigns.
Public exploit code: 1 Metasploit module, 2 Exploit-DB entries and 25 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Exchange Server
- CVE-2024-21410 Microsoft Exchange Server Privilege Escalation
- CVE-2021-34473 Microsoft Exchange Server Remote Code Execution
- CVE-2021-26855 Microsoft Exchange Server Remote Code Execution
- CVE-2021-34523 Microsoft Exchange Server Privilege Escalation
- CVE-2023-21529 Microsoft Exchange Server Deserialization of Untrusted Data
Sources
Also known as GHSA-4g56-8mc7-hpjq.