← Vulnerability feed

Vulnerability record · CVE-2013-5580 · published 1 October 2013

CVE-2013-5580: Barton ngircd improper input validation vulnerability

Barton · Ngircd

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.

4.3 CVSS 2.0 Medium EPSS 2.3% · top 17.2% CWE-20 · Improper input validation
4.3CVSS 2.0 base score
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd.git%3Ba=commit%3Bh=309122017ebc6fff039a7cab1b82f632853d82d5
http://arthur.barton.de/pipermail/ngircd-ml/2013-August/000645.html
http://freecode.com/projects/ngircd/releases/357245 Patch
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115047.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115077.html
http://osvdb.org/96590
http://secunia.com/advisories/54567 Vendor Advisory
http://arthur.barton.de/cgi-bin/gitweb.cgi?p=ngircd.git%3Ba=commit%3Bh=309122017ebc6fff039a7cab1b82f632853d82d5
http://arthur.barton.de/pipermail/ngircd-ml/2013-August/000645.html
http://freecode.com/projects/ngircd/releases/357245 Patch
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115047.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-September/115077.html
http://osvdb.org/96590
http://secunia.com/advisories/54567 Vendor Advisory

Track CVE-2013-5580 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2005-0199Barton ngircd vulnerabilityInteger underflow in the Lists_MakeMask() function in lists.c in ngIRCd before 0.8.2 allows remote attackers to cause a denial of service (applicatio…EPSS 19%7.5CVE-2020-14148Barton ngircd out-of-bounds read vulnerabilityThe Server-Server protocol implementation in ngIRCd before 26~rc2 allows an out-of-bounds access, as demonstrated by the IRC_NJOIN() function.EPSS 2.6%9.5CVE-2026-88771Citrix netscaler application delivery controller improper input validation vulnerabilityImproper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-…KEVEPSS 1.1%9.5CVE-2026-93952Arista velocloud orchestrator improper input validation vulnerabilityVeloCloud Orchestrator (VCO) on-prem has a security issue where this issue may allow a remote attacker to access privileged internal functionality an…KEVEPSS 1.1%8.8CVE-2019-1068Microsoft SQL Server improper input validation remote code executionMicrosoft SQL Server mishandles processing of internal functions, allowing an authenticated remote attacker to execute code on the database server. T…KEVEPSS 58%analysed5.9CVE-2025-68686FortiOS symbolic link patch bypass exposes sensitive informationFortiOS contains an information exposure flaw (CWE-200) that lets a remote unauthenticated attacker bypass the patch for the symbolic link persistenc…KEVEPSS 30%analysed9.3CVE-2026-12569PTC Windchill PDMlink and FlexPLM deserialization RCEPTC Windchill PDMlink and FlexPLM contain a deserialization of untrusted data flaw (also classified as improper input validation) that allows remote …KEVEPSS 46%analysed10.0CVE-2026-34910Ubiquiti UniFi OS input validation flaw allows command injectionUniFi OS devices contain an improper input validation vulnerability (CWE-20) that lets a network-reachable attacker inject and execute commands. It a…KEVEPSS 46%analysed

Source: NIST National Vulnerability Database (record CVE-2013-5580), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.