Unrated severityNVD Advisory· Published Aug 12, 2002· Updated Jun 16, 2026

CVE-2002-0514

Description

PF in OpenBSD 3.0 with the return-rst rule sets the TTL to 128 in the RST packet, which allows remote attackers to determine if a port is being filtered because the TTL is different than the default TTL.

Affected products

OpenBSD/OpenBSD2 versions
cpe:2.3:o:openbsd:openbsd:3.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:openbsd:openbsd:3.0:*:*:*:*:*:*:*
- (no CPE)range: =3.0

Patches

Vulnerability mechanics

References

www.securityfocus.com/bid/4401nvdBroken LinkExploitThird Party AdvisoryVDB EntryVendor Advisory
www.iss.net/security_center/static/8738.phpnvdBroken LinkVendor Advisory
www.securityfocus.com/archive/1/265188nvdBroken LinkThird Party AdvisoryVDB EntryVendor Advisory

News mentions

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