CVE-2020-25577

Description

In FreeBSD 12.2-STABLE before r368250, 11.4-STABLE before r368253, 12.2-RELEASE before p1, 12.1-RELEASE before p11 and 11.4-RELEASE before p5 rtsold(8) does not verify that the RDNSS option does not extend past the end of the received packet before processing its contents. While the kernel currently ignores such malformed packets, it passes them to userspace programs. Any programs expecting the kernel to do validation may be vulnerable to an overflow.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.58%
Vendor Advisory FreeBSD.org
Affected: n/a FreeBSD
Published at:
Updated at:

References

Link Tags
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:32.rtsold.asc vendor advisory
https://security.netapp.com/advisory/ntap-20210423-0001/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-25577?
CVE-2020-25577 has been scored as a critical severity vulnerability.
How to fix CVE-2020-25577?
To fix CVE-2020-25577, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-25577 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-25577 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-25577?
CVE-2020-25577 affects n/a FreeBSD.
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