How severe is CVE-2003-0653?

CVE-2003-0653 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2003-0653 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-0653?

CVE-2003-0653 primarily affects Netbsd. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2003-0653?

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

When was CVE-2003-0653 published?

CVE-2003-0653 was published on 2003-08-27 and last updated on 2026-06-16.

CVE-2003-0653

CVE-2003-0653 is a medium-severity vulnerability in Netbsd 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% (66th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netbsd
Published: 2003-08-27
Last modified: 2026-06-16

Description

The OSI networking kernel (sys/netiso) in NetBSD 1.6.1 and earlier does not use a BSD-required "PKTHDR" mbuf when sending certain error responses to the sender of an OSI packet, which allows remote attackers to cause a denial of service (kernel panic or crash) via certain OSI packets.

Frequently asked questions

What is CVE-2003-0653?: The OSI networking kernel (sys/netiso) in NetBSD 1.6.1 and earlier does not use a BSD-required "PKTHDR" mbuf when sending certain error responses to the sender of an OSI packet, which allows remote attackers to cause a denial of service (kernel panic or crash) via certain OSI packets.
How severe is CVE-2003-0653?: CVE-2003-0653 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2003-0653 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-0653?: CVE-2003-0653 primarily affects Netbsd. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-0653?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-0653 published?: CVE-2003-0653 was published on 2003-08-27 and last updated on 2026-06-16.

References

ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2003-010.txt.asc

Affected products (6)

cpe:2.3:o:netbsd:netbsd:1.5:*:*:*:*:*:*:*
cpe:2.3:o:netbsd:netbsd:1.5.1:*:*:*:*:*:*:*
cpe:2.3:o:netbsd:netbsd:1.5.2:*:*:*:*:*:*:*
cpe:2.3:o:netbsd:netbsd:1.5.3:*:*:*:*:*:*:*
cpe:2.3:o:netbsd:netbsd:1.6:*:*:*:*:*:*:*
cpe:2.3:o:netbsd:netbsd:1.6.1:*:*:*:*:*:*:*

More vulnerabilities in Netbsd

CVE-2006-4304 — Critical (CVSS 10.0): Buffer overflow in the sppp driver in FreeBSD 4.11 through 6.1, NetBSD 2.0 through 4.0 beta before 20060823, and…
CVE-2003-0694 — Critical (CVSS 10.0): The prescan function in Sendmail 8.12.9 allows remote attackers to execute arbitrary code via buffer overflow attacks,…
CVE-2002-1337 — Critical (CVSS 10.0): Buffer overflow in Sendmail 5.79 to 8.12.7 allows remote attackers to execute arbitrary code via certain formatted…
CVE-2001-0554 — Critical (CVSS 10.0): Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute…
CVE-2001-0247 — Critical (CVSS 10.0): Buffer overflows in BSD-based FTP servers allows remote attackers to execute arbitrary commands via a long pattern…
CVE-2001-0053 — Critical (CVSS 10.0): One-byte buffer overflow in replydirname function in BSD-based ftpd allows remote attackers to gain root privileges.

All CVEs affecting Netbsd →