CVE-2020-8340 Cross-site scripting in System x IMM2 firmware
Cross-site scripting in IBM/Lenovo IMM2 firmware allows JavaScript execution in user browsers via crafted URLs, requiring user interaction and network knowledge.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-8340?
CVE-2020-8340 is a medium-severity cross-site scripting vulnerability in IBM System x IMM2 firmware, published on 15 Sep 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A cross-site scripting (XSS) vulnerability was discovered in the legacy IBM and Lenovo System x IMM2 (Integrated Management Module 2), prior to version 5.60, embedded Baseboard Management Controller (BMC) web interface during an internal security review. This vulnerability could allow JavaScript code to be executed in the user's web browser if the user is convinced to visit a crafted URL, possibly through phishing. Successful exploitation requires specific knowledge about the user’s network to be included in the crafted URL. Impact is limited to the normal access restrictions and permissions of the user clicking the crafted URL, and subject to the user being able to connect to and already being authenticated to IMM2 or other systems. The JavaScript code is not executed on IMM2 itself.
Weakness: CWE-79
Which versions are affected by CVE-2020-8340?
It affects 1 product.
Products include Lenovo Integrated Management Module 2.
How do I fix CVE-2020-8340?
No fix has been published for CVE-2020-8340 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-8340 being exploited?
There is no known exploitation of CVE-2020-8340 in the wild and no public exploit code.
Other vulnerabilities in IBM System x IMM2 firmware
Sources
Also known as GHSA-6gmj-5hf7-3xr4.