How severe is CVE-2001-0855?

CVE-2001-0855 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2001-0855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0855?

CVE-2001-0855 primarily affects Rational Software Clearcase. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2001-0855?

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-2001-0855 published?

CVE-2001-0855 was published on 2001-12-06 and last updated on 2026-06-16.

CVE-2001-0855

CVE-2001-0855 is a high-severity vulnerability in Rational Software Clearcase 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: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Rational Software Clearcase
Published: 2001-12-06
Last modified: 2026-06-16

Description

Buffer overflow in db_loader in ClearCase 4.2 and earlier allows local users to gain root privileges via a long TERM environment variable.

Frequently asked questions

What is CVE-2001-0855?: Buffer overflow in db_loader in ClearCase 4.2 and earlier allows local users to gain root privileges via a long TERM environment variable.
How severe is CVE-2001-0855?: CVE-2001-0855 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2001-0855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0855?: CVE-2001-0855 primarily affects Rational Software Clearcase. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-0855?: 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-2001-0855 published?: CVE-2001-0855 was published on 2001-12-06 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:rational_software:clearcase:3.2_plus:*:*:*:*:*:*:*
cpe:2.3:a:rational_software:clearcase:4.0:*:*:*:*:*:*:*
cpe:2.3:a:rational_software:clearcase:4.1:*:*:*:*:*:*:*
cpe:2.3:a:rational_software:clearcase:4.2:*:*:*:*:*:*:*

More vulnerabilities in Rational Software Clearcase

CVE-1999-0350 — Medium (CVSS 6.2): Race condition in the db_loader program in ClearCase gives local users root access by setting SUID bits.
CVE-2002-1322 — Medium (CVSS 5.0): Rational ClearCase 4.1, 2002.05, and possibly other versions allows remote attackers to cause a denial of service…

All CVEs affecting Rational Software Clearcase →