Unrated severityNVD Advisory· Published Dec 23, 2013· Updated Apr 29, 2026

CVE-2013-6890

Description

denyhosts 2.6 uses an incorrect regular expression when analyzing authentication logs, which allows remote attackers to cause a denial of service (incorrect block of IP addresses) via crafted login names.

Affected products

Denyhosts/Denyhosts
cpe:2.3:a:phil_schwartz:denyhosts:2.6:*:*:*:*:*:*:*
Debian/Debian Linux3 versions
cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:7.1:*:*:*:*:*:*:*
Fedoraproject/Fedora
cpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

secunia.com/advisories/56239nvdVendor Advisory
seclists.org/oss-sec/2013/q4/535nvd
www.debian.org/security/2013/dsa-2826nvd
bugzilla.redhat.com/show_bug.cginvd

News mentions

No linked articles in our index yet.

cvss	0.000
epss	0.009
exploit	0.030
kev	0.000
patch	0.000
ransomware	0.000