CVE-2001-1030

CVE-2001-1030 is a high-severity vulnerability in Caldera Openlinux Server with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Squid before 2.3STABLE5 in HTTP accelerator mode does not enable access control lists (ACLs) when the httpd_accel_host and http_accel_with_proxy off settings are used, which allows attackers to bypass the ACLs and conduct unauthorized activities such as port scanning.

Frequently asked questions

What is CVE-2001-1030?
Squid before 2.3STABLE5 in HTTP accelerator mode does not enable access control lists (ACLs) when the httpd_accel_host and http_accel_with_proxy off settings are used, which allows attackers to bypass the ACLs and conduct unauthorized activities such as port scanning.
How severe is CVE-2001-1030?
CVE-2001-1030 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-1030 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-1030?
CVE-2001-1030 primarily affects Caldera Openlinux Server. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-1030?
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-2001-1030 published?
CVE-2001-1030 was published on 2001-07-18 and last updated on 2026-06-16.

References

Affected products (15)

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