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