How severe is CVE-2013-5580?

CVE-2013-5580 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2013-5580 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-5580?

CVE-2013-5580 primarily affects Barton Ngircd. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-5580?

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

When was CVE-2013-5580 published?

CVE-2013-5580 was published on 2013-10-01 and last updated on 2026-06-16.

CVE-2013-5580

CVE-2013-5580 is a medium-severity vulnerability in Barton Ngircd with a CVSS 2.0 base score of 4.3. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Barton Ngircd
Published: 2013-10-01
Last modified: 2026-06-16

Description

The (1) Conn_StartLogin and (2) cb_Read_Resolver_Result functions in conn.c in ngIRCd 18 through 20.2, when the configuration option NoticeAuth is enabled, does not properly handle the return code for the Handle_Write function, which allows remote attackers to cause a denial of service (assertion failure and server crash) via unspecified vectors, related to a "notice auth" message not being sent to a new client.

Frequently asked questions

What is CVE-2013-5580?: The (1) Conn_StartLogin and (2) cb_Read_Resolver_Result functions in conn.c in ngIRCd 18 through 20.2, when the configuration option NoticeAuth is enabled, does not properly handle the return code for the Handle_Write function, which allows remote attackers to cause a denial of service (assertion failure and server crash) via unspecified vectors, related to a "notice auth" message not being sent to a new client.
How severe is CVE-2013-5580?: CVE-2013-5580 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-5580 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-5580?: CVE-2013-5580 primarily affects Barton Ngircd. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-5580?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-5580 published?: CVE-2013-5580 was published on 2013-10-01 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:a:barton:ngircd:18.0:*:*:*:*:*:*:*
cpe:2.3:a:barton:ngircd:19.0:*:*:*:*:*:*:*
cpe:2.3:a:barton:ngircd:19.1:*:*:*:*:*:*:*
cpe:2.3:a:barton:ngircd:20.0:*:*:*:*:*:*:*
cpe:2.3:a:barton:ngircd:20.1:*:*:*:*:*:*:*
cpe:2.3:a:barton:ngircd:20.2:*:*:*:*:*:*:*

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