CVE-2020-25577

CRITICAL Year: 2020
CVSS v3 Score
9.8
Critical
CVSS v2 Score
10.0
Critical
Weakness Type
CWE-120
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Vulnerability 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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