CVE-2020-7469 Use after free in FreeBSD
A use-after-free vulnerability in the FreeBSD ICMPv6 routing option handler allows attackers to potentially execute code or cause a denial of service.
- 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-2020-7469?
CVE-2020-7469 is a high-severity use after free vulnerability in Freebsd Freebsd, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In FreeBSD 12.2-STABLE before r367402, 11.4-STABLE before r368202, 12.2-RELEASE before p1, 12.1-RELEASE before p11 and 11.4-RELEASE before p5 the handler for a routing option caches a pointer into the packet buffer holding the ICMPv6 message. However, when processing subsequent options the packet buffer may be freed, rendering the cached pointer invalid. The network stack may later dereference the pointer, potentially triggering a use-after-free.
Weakness: CWE-416
Which versions are affected by CVE-2020-7469?
It affects 2 products.
Products include Freebsd Freebsd, Netapp Clustered Data Ontap.
How do I fix CVE-2020-7469?
No fix has been published for CVE-2020-7469 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-7469 being exploited?
There is no known exploitation of CVE-2020-7469 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-cxxf-mg7m-vpfq.