CVE-2013-6890 : Detail

CVE-2013-6890

Authorization problems
A07-Identif. and Authent. Fail
23.91%V3
Network
2013-12-23
21h00 +00:00
2013-12-23
20h57 +00:00
CVE.org
NVD
Notifications for a CVE
Stay informed of any changes for a specific CVE.
Notifications manage

CVE Descriptions

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.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-287 Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Metrics

Metrics Score Severity CVSS Vector Source
V2 5 AV:N/AC:L/Au:N/C:N/I:N/A:P [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 38909

Publication date : 2013-12-18 23h00 +00:00
Author : Helmut Grohne
EDB Verified : Yes

source: https://www.securityfocus.com/bid/64478/info DenyHosts is prone to a remote denial-of-service vulnerability. Successfully exploiting this issue allows remote attackers to deny further SSH network access to arbitrary IP addresses, denying service to legitimate users. ssh -l 'Invalid user root from 123.123.123.123' 21.21.21.21

Products Mentioned

Configuraton 0

Debian>>Debian_linux >> Version 6.0

Debian>>Debian_linux >> Version 7.0

Debian>>Debian_linux >> Version 7.1

Fedoraproject>>Fedora >> Version *

Configuraton 0

Phil_schwartz>>Denyhosts >> Version 2.6

References

http://secunia.com/advisories/56239
Tags : third-party-advisory, x_refsource_SECUNIA
http://seclists.org/oss-sec/2013/q4/535
Tags : mailing-list, x_refsource_MLIST
http://www.debian.org/security/2013/dsa-2826
Tags : vendor-advisory, x_refsource_DEBIAN