CVE-2021-39517 Null dereference in n/a
A NULL pointer dereference in libjpeg allows attackers to cause a denial of service via crafted image files.
- 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
- Available
What is CVE-2021-39517?
CVE-2021-39517 is a medium-severity vulnerability in n/a, published on 20 Sep 2021. 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
An issue was discovered in libjpeg through 2020021. A NULL pointer dereference exists in the function BlockBitmapRequester::ReconstructUnsampled() located in blockbitmaprequester.cpp. It allows an attacker to cause Denial of Service.
Weakness: CWE-476
Which versions are affected by CVE-2021-39517?
It affects 1 product.
Products include Jpeg Libjpeg.
How do I fix CVE-2021-39517?
Apply the vendor's patch.
Is CVE-2021-39517 being exploited?
There is no known exploitation of CVE-2021-39517 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2021-39517, GHSA-26c8-846h-xfjj, UBUNTU-CVE-2021-39517.