How severe is CVE-1999-0323?

CVE-1999-0323 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-1999-0323 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0323?

CVE-1999-0323 primarily affects Bsdi Bsd Os. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0323?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-1999-0323 published?

CVE-1999-0323 was published on 1998-02-20 and last updated on 2026-06-16.

CVE-1999-0323

CVE-1999-0323 is a critical-severity vulnerability in Bsdi Bsd Os with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Bsdi Bsd Os
Published: 1998-02-20
Last modified: 2026-06-16

Description

FreeBSD mmap function allows users to modify append-only or immutable files.

Frequently asked questions

What is CVE-1999-0323?: FreeBSD mmap function allows users to modify append-only or immutable files.
How severe is CVE-1999-0323?: CVE-1999-0323 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-0323 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0323?: CVE-1999-0323 primarily affects Bsdi Bsd Os. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0323?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-1999-0323 published?: CVE-1999-0323 was published on 1998-02-20 and last updated on 2026-06-16.

References

ftp://ftp.NetBSD.ORG/pub/NetBSD/misc/security/advisories/NetBSD-SA1998-003.txt.asc

Affected products (4)

cpe:2.3:o:bsdi:bsd_os:3.0:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:2.2:*:*:*:*:*:*:*
cpe:2.3:o:netbsd:netbsd:2.0.4:*:*:*:*:*:*:*
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-1999-0042 — Critical (CVSS 10.0): Buffer overflow in University of Washington's implementation of IMAP and POP servers.
CVE-1999-0165 — Critical (CVSS 10.0): NFS cache poisoning.

All CVEs affecting Bsdi Bsd Os →