CVE-2013-6890

Debian Linux - Authentication Bypass

Title source: rule
STIX 2.1

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Helmut Grohne · textdoslinux
https://www.exploit-db.com/exploits/38909

References (4)

Core 4
Core References
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/56239
Issue Tracking x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1045982
Mailing List mailing-list x_refsource_mlist
http://seclists.org/oss-sec/2013/q4/535
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2013/dsa-2826

Scores

EPSS 0.1097
EPSS Percentile 93.5%

Details

CWE
CWE-287
Status published
Products (5)
debian/debian_linux 6.0
debian/debian_linux 7.0
debian/debian_linux 7.1
fedoraproject/fedora
phil_schwartz/denyhosts 2.6
Published Dec 23, 2013
Tracked Since Feb 18, 2026