Critical severity9.8NVD Advisory· Published Mar 29, 2021· Updated Jun 17, 2026
CVE-2020-25577
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.
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Affected products
17cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*+ 14 more
- cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:11.4:p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:11.4:p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:11.4:p3:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:-:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p3:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p4:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p5:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p6:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p7:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p8:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.1:p9:*:*:*:*:*:*
- cpe:2.3:o:freebsd:freebsd:12.2:-:*:*:*:*:*:*
- FreeBSD/FreeBSDdescription
Patches
Vulnerability mechanics
References
2- security.freebsd.org/advisories/FreeBSD-SA-20:32.rtsold.ascnvdVendor Advisory
- security.netapp.com/advisory/ntap-20210423-0001/nvdThird Party Advisory
News mentions
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