CVE-2020-17144 Microsoft Exchange Server Remote Code Execution
Attackers can execute arbitrary code on Microsoft Exchange Server via a deserialization vulnerability, requiring immediate patching.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-17144?
CVE-2020-17144 is a high-severity unsafe deserialization vulnerability in Microsoft Exchange Server, published on 9 Dec 2020. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Microsoft Exchange Remote Code Execution Vulnerability
Weakness: CWE-502
Which versions are affected by CVE-2020-17144?
It affects 1 product.
Products include Microsoft Exchange Server.
How do I fix CVE-2020-17144?
No fix has been published for CVE-2020-17144 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2020-17144 being exploited?
Yes. Attackers have exploited CVE-2020-17144 in the wild since at least 3 Nov 2021.
Public exploit code: 2 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-68q4-hg7f-7p9c.