CVE-2023-20236 Security feature bypass in Cisco IOS XR Software
An authenticated local attacker can bypass image verification to boot unverified software on Cisco IOS XR devices.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-20236?
CVE-2023-20236 is a medium-severity vulnerability in Cisco Ios Xr, published on 13 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software image on an affected device. This vulnerability is due to insufficient image verification. An attacker could exploit this vulnerability by manipulating the boot parameters for image verification during the iPXE boot process on an affected device. A successful exploit could allow the attacker to boot an unverified software image on the affected device.
Which versions are affected by CVE-2023-20236?
It affects 1 product.
Products include Cisco Ios Xr.
How do I fix CVE-2023-20236?
No fix has been published for CVE-2023-20236 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-20236 being exploited?
There is no known exploitation of CVE-2023-20236 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios Xr
- CVE-2020-3118 Cisco IOS XR Software Discovery Protocol Format String
- CVE-2020-3569 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2020-3566 Cisco IOS XR Software DVMRP Memory Exhaustion
- CVE-2010-3035 Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service
- CVE-2022-20821 Cisco IOS XR Open Port
Sources
Also known as GHSA-j2wp-f4r8-6834.