How severe is CVE-2003-1377?

CVE-2003-1377 has a CVSS 2.0 base score of 8.3, rated high severity.

Is CVE-2003-1377 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-1377?

CVE-2003-1377 primarily affects Sircd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2003-1377?

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-2003-1377 published?

CVE-2003-1377 was published on 2003-12-31 and last updated on 2026-06-16.

CVE-2003-1377

CVE-2003-1377 is a high-severity vulnerability in Sircd with a CVSS 2.0 base score of 8.3. 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-119.

Key facts

Severity: High (CVSS 2.0 base score 8.3)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Sircd
Published: 2003-12-31
Last modified: 2026-06-16

Description

Buffer overflow in the reverse DNS lookup of Smart IRC Daemon (SIRCD) 0.4.0 and 0.4.4 allows remote attackers to execute arbitrary code via a client with a long hostname.

Frequently asked questions

What is CVE-2003-1377?: Buffer overflow in the reverse DNS lookup of Smart IRC Daemon (SIRCD) 0.4.0 and 0.4.4 allows remote attackers to execute arbitrary code via a client with a long hostname.
How severe is CVE-2003-1377?: CVE-2003-1377 has a CVSS 2.0 base score of 8.3, rated high severity.
Is CVE-2003-1377 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1377?: CVE-2003-1377 primarily affects Sircd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-1377?: 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-2003-1377 published?: CVE-2003-1377 was published on 2003-12-31 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:sircd:sircd:0.4.0:*:*:*:*:*:*:*
cpe:2.3:a:sircd:sircd:0.4.4:*:*:*:*:*:*:*

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →