How severe is CVE-2009-1893?

CVE-2009-1893 has a CVSS 2.0 base score of 6.9, rated medium severity.

Is CVE-2009-1893 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1893?

CVE-2009-1893 primarily affects Redhat Enterprise Linux. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1893?

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

When was CVE-2009-1893 published?

CVE-2009-1893 was published on 2009-07-17 and last updated on 2026-06-16.

CVE-2009-1893

CVE-2009-1893 is a medium-severity vulnerability in Redhat Enterprise Linux with a CVSS 2.0 base score of 6.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-59.

Key facts

Severity: Medium (CVSS 2.0 base score 6.9)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Redhat Enterprise Linux
Published: 2009-07-17
Last modified: 2026-06-16

Description

The configtest function in the Red Hat dhcpd init script for DHCP 3.0.1 in Red Hat Enterprise Linux (RHEL) 3 allows local users to overwrite arbitrary files via a symlink attack on an unspecified temporary file, related to the "dhcpd -t" command.

Frequently asked questions

What is CVE-2009-1893?: The configtest function in the Red Hat dhcpd init script for DHCP 3.0.1 in Red Hat Enterprise Linux (RHEL) 3 allows local users to overwrite arbitrary files via a symlink attack on an unspecified temporary file, related to the "dhcpd -t" command.
How severe is CVE-2009-1893?: CVE-2009-1893 has a CVSS 2.0 base score of 6.9, rated medium severity.
Is CVE-2009-1893 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1893?: CVE-2009-1893 primarily affects Redhat Enterprise Linux. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1893?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1893 published?: CVE-2009-1893 was published on 2009-07-17 and last updated on 2026-06-16.

References

Affected products (16)

cpe:2.3:o:redhat:enterprise_linux:3.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:3.0:*:as:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:3.0:*:es:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:3.0:*:ws:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc10:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc11:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc12:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc13:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc14:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc2:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc5:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc6:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc7:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc8:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:3.0.1:rc9:*:*:*:*:*:*

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