Fail2ban 0.8.9, Denial of Service (Apache rules only)

2013-06-11 / 2013-06-15

Credit: Krzysztof Katowicz-Kowalewski

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2013-2178

CWE: CWE-20

Ogólna skala CVSS: 5/10

Znaczenie: 2.9/10

Łatwość wykorzystania: 10/10

Wymagany dostęp: Zdalny

Złożoność ataku: Niska

Autoryzacja: Nie wymagana

Wpływ na poufność: Brak

Wpływ na integralność: Brak

Wpływ na dostępność: Częściowy

Version 0.8.9 (latest) of Fail2ban allows to perform remote denial of service for arbitrary chosen IP address. Address
listed on Fail2ban's whitelist are not affected. The vulnerability exists in Apache rules and it is caused by improper
validation of a log file by regular expression. Malicious user can easily inject his own data to analyzed logs and
deceive monitoring engine.
Affected files:
/filter.d/apache-auth.conf
/filter.d/apache-nohome.conf
/filter.d/apache-noscript.conf
/filter.d/apache-overflows.conf
Time frames:
01.06.2013 - Cyril Jaquier (contact section) has been informed about the vulnerability (no response)
08.06.2013 - The vulnerability has been released to the public.
More information, including proof of concept and patches is available here:
https://vndh.net/note:fail2ban-089-denial-service

Referencje:

https://vndh.net/note:fail2ban-089-denial-service

http://seclists.org/oss-sec/2013/q2/557

See this note in RAW Version

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Fail2ban 0.8.9, Denial of Service (Apache rules only)

Referencje:

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