How severe is CVE-1999-0305?

CVE-1999-0305 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0305 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0305?

CVE-1999-0305 primarily affects Bsdi Bsd Os. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0305?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-0305 published?

CVE-1999-0305 was published on 1998-02-01 and last updated on 2026-06-16.

CVE-1999-0305

CVE-1999-0305 is a medium-severity vulnerability in Bsdi Bsd Os with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Bsdi Bsd Os
Published: 1998-02-01
Last modified: 2026-06-16

Description

The system configuration control (sysctl) facility in BSD based operating systems OpenBSD 2.2 and earlier, and FreeBSD 2.2.5 and earlier, does not properly restrict source routed packets even when the (1) dosourceroute or (2) forwarding variables are set, which allows remote attackers to spoof TCP connections.

Frequently asked questions

What is CVE-1999-0305?: The system configuration control (sysctl) facility in BSD based operating systems OpenBSD 2.2 and earlier, and FreeBSD 2.2.5 and earlier, does not properly restrict source routed packets even when the (1) dosourceroute or (2) forwarding variables are set, which allows remote attackers to spoof TCP connections.
How severe is CVE-1999-0305?: CVE-1999-0305 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0305 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0305?: CVE-1999-0305 primarily affects Bsdi Bsd Os. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0305?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0305 published?: CVE-1999-0305 was published on 1998-02-01 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:o:bsdi:bsd_os:*:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:2.2:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:2.2.5:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:2.0:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:2.1:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:2.2:*:*:*:*:*:*:*

More vulnerabilities in Bsdi Bsd Os

CVE-1999-0879 — Critical (CVSS 10.0): Buffer overflow in WU-FTPD and related FTP servers allows remote attackers to gain root privileges via macro variables…
CVE-1999-0798 — Critical (CVSS 10.0): Buffer overflow in bootpd on OpenBSD, FreeBSD, and Linux systems via a malformed header type.
CVE-1999-0002 — Critical (CVSS 10.0): Buffer overflow in NFS mountd gives root access to remote attackers, mostly in Linux systems.
CVE-1999-0009 — Critical (CVSS 10.0): Inverse query buffer overflow in BIND 4.9 and BIND 8 Releases.
CVE-1999-0323 — Critical (CVSS 10.0): FreeBSD mmap function allows users to modify append-only or immutable files.
CVE-1999-0042 — Critical (CVSS 10.0): Buffer overflow in University of Washington's implementation of IMAP and POP servers.

All CVEs affecting Bsdi Bsd Os →