How severe is CVE-1999-1253?

CVE-1999-1253 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-1999-1253 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1253?

CVE-1999-1253 primarily affects Sco Internet Faststart. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1253?

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

When was CVE-1999-1253 published?

CVE-1999-1253 was published on 1996-06-07 and last updated on 2026-06-16.

CVE-1999-1253

CVE-1999-1253 is a high-severity vulnerability in Sco Internet Faststart with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Sco Internet Faststart
Published: 1996-06-07
Last modified: 2026-06-16

Description

Vulnerability in a kernel error handling routine in SCO OpenServer 5.0.2 and earlier, and SCO Internet FastStart 1.0, allows local users to gain root privileges.

Frequently asked questions

What is CVE-1999-1253?: Vulnerability in a kernel error handling routine in SCO OpenServer 5.0.2 and earlier, and SCO Internet FastStart 1.0, allows local users to gain root privileges.
How severe is CVE-1999-1253?: CVE-1999-1253 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-1999-1253 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1253?: CVE-1999-1253 primarily affects Sco Internet Faststart. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1253?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-1999-1253 published?: CVE-1999-1253 was published on 1996-06-07 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:sco:internet_faststart:1.0:*:*:*:*:*:*:*
cpe:2.3:o:sco:openserver:*:*:*:*:*:*:*:*
cpe:2.3:o:sco:openserver:5.0:*:*:*:*:*:*:*

More vulnerabilities in Sco Internet Faststart

CVE-1999-0798 — Critical (CVSS 10.0): Buffer overflow in bootpd on OpenBSD, FreeBSD, and Linux systems via a malformed header type.
CVE-1999-1185 — High (CVSS 7.2): Buffer overflow in SCO mscreen allows local users to gain root privileges via a long terminal entry (TERM) in the…
CVE-1999-0131 — High (CVSS 7.2): Buffer overflow and denial of service in Sendmail 8.7.5 and earlier through GECOS field gives root access to local…
CVE-1999-0023 — High (CVSS 7.2): Local user gains root privileges via buffer overflow in rdist, via lookup() function.
CVE-1999-0345 — Medium (CVSS 5.0): Jolt ICMP attack causes a denial of service in Windows 95 and Windows NT systems.
CVE-1999-0128 — Medium (CVSS 5.0): Oversized ICMP ping packets can result in a denial of service, aka Ping o' Death.

All CVEs affecting Sco Internet Faststart →