CVE-2022-23968 Denial of service in n/a
Remote attackers can cause a permanent denial of service on Xerox VersaLink devices by sending a crafted TIFF file, requiring a field technician to resolve the boot loop.
- 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-2022-23968?
CVE-2022-23968 is a high-severity denial of service vulnerability in n/a, published on 26 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Xerox VersaLink devices on specific versions of firmware before 2022-01-26 allow remote attackers to brick the device via a crafted TIFF file in an unauthenticated HTTP POST request. There is a permanent denial of service because image parsing causes a reboot, but image parsing is restarted as soon as the boot process finishes. However, this boot loop can be resolved by a field technician. The TIFF file must have an incomplete Image Directory. Affected firmware versions include xx.42.01 and xx.50.61. NOTE: the 2022-01-24 NeoSmart article included "believed to affect all previous and later versions as of the date of this posting" but a 2022-01-26 vendor statement reports "the latest versions of firmware are not vulnerable to this issue."
Weakness: CWE-835
Which versions are affected by CVE-2022-23968?
It affects 1 product.
Products include Xerox Versalink Firmware.
How do I fix CVE-2022-23968?
No fix has been published for CVE-2022-23968 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-23968 being exploited?
There is no known exploitation of CVE-2022-23968 in the wild and no public exploit code.
Sources
Also known as GHSA-4749-xq6x-59v3.