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Vulnerability Details : CVE-2008-3656

Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.
Publish Date : 2008-08-12 Last Update Date : 2018-10-11
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 399

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat moderate 2008-08-08 2008-08-08
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- Related OVAL Definitions

Title Definition Id Class Family
Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFile... oval:org.mitre.oval:def:9682 unix
CVE-2008-3656 unix
DSA-1651 ruby1.8 -- several vulnerabilities oval:org.mitre.oval:def:7935 unix
DSA-1651-1 ruby1.8 - several vulnerabilities oval:org.mitre.oval:def:20309 unix
DSA-1652 ruby1.9 -- several vulnerabilities oval:org.mitre.oval:def:8055 unix
DSA-1652-1 ruby1.9 - several vulnerabilities oval:org.mitre.oval:def:18456 unix
ELSA-2008:0897: ruby security update (Moderate) oval:org.mitre.oval:def:21785 unix
RHSA-2008:0897 -- ruby security update (Moderate) oval:org.mitre.oval:def:28242 unix
RHSA-2008:0897: ruby security update (Moderate) oval:com.redhat.rhsa:def:20080897 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2008-3656

# Product Type Vendor Product Version Update Edition Language
1 Application Ruby-lang Ruby 1.6.8 Version Details Vulnerabilities
2 Application Ruby-lang Ruby 1.8.0 Version Details Vulnerabilities
3 Application Ruby-lang Ruby 1.8.1 Version Details Vulnerabilities
4 Application Ruby-lang Ruby 1.8.1 -9 Version Details Vulnerabilities
5 Application Ruby-lang Ruby 1.8.2 Version Details Vulnerabilities
6 Application Ruby-lang Ruby 1.8.2 Preview2 Version Details Vulnerabilities
7 Application Ruby-lang Ruby 1.8.2 Preview3 Version Details Vulnerabilities
8 Application Ruby-lang Ruby 1.8.2 Preview4 Version Details Vulnerabilities
9 Application Ruby-lang Ruby 1.8.3 Preview2 Version Details Vulnerabilities
10 Application Ruby-lang Ruby 1.8.3 Preview3 Version Details Vulnerabilities
11 Application Ruby-lang Ruby 1.8.3 Version Details Vulnerabilities
12 Application Ruby-lang Ruby 1.8.3 Preview1 Version Details Vulnerabilities
13 Application Ruby-lang Ruby 1.8.4 Preview3 Version Details Vulnerabilities
14 Application Ruby-lang Ruby 1.8.4 Version Details Vulnerabilities
15 Application Ruby-lang Ruby 1.8.4 Preview1 Version Details Vulnerabilities
16 Application Ruby-lang Ruby 1.8.4 Preview2 Version Details Vulnerabilities
17 Application Ruby-lang Ruby 1.8.5 Preview2 Version Details Vulnerabilities
18 Application Ruby-lang Ruby 1.8.5 P115 Version Details Vulnerabilities
19 Application Ruby-lang Ruby 1.8.5 Preview3 Version Details Vulnerabilities
20 Application Ruby-lang Ruby 1.8.5 P12 Version Details Vulnerabilities
21 Application Ruby-lang Ruby 1.8.5 Preview4 Version Details Vulnerabilities
22 Application Ruby-lang Ruby 1.8.5 P2 Version Details Vulnerabilities
23 Application Ruby-lang Ruby 1.8.5 Version Details Vulnerabilities
24 Application Ruby-lang Ruby 1.8.5 Preview5 Version Details Vulnerabilities
25 Application Ruby-lang Ruby 1.8.5 P35 Version Details Vulnerabilities
26 Application Ruby-lang Ruby 1.8.5 P11 Version Details Vulnerabilities
27 Application Ruby-lang Ruby 1.8.5 Preview1 Version Details Vulnerabilities
28 Application Ruby-lang Ruby 1.8.5 P113 Version Details Vulnerabilities
29 Application Ruby-lang Ruby 1.8.6 P114 Version Details Vulnerabilities
30 Application Ruby-lang Ruby 1.8.6 Preview1 Version Details Vulnerabilities
31 Application Ruby-lang Ruby 1.8.6 Preview2 Version Details Vulnerabilities
32 Application Ruby-lang Ruby 1.8.6 Preview3 Version Details Vulnerabilities
33 Application Ruby-lang Ruby 1.8.6 Version Details Vulnerabilities
34 Application Ruby-lang Ruby 1.8.6 P110 Version Details Vulnerabilities
35 Application Ruby-lang Ruby 1.8.7 Preview3 Version Details Vulnerabilities
36 Application Ruby-lang Ruby 1.8.7 P17 Version Details Vulnerabilities
37 Application Ruby-lang Ruby 1.8.7 Preview4 Version Details Vulnerabilities
38 Application Ruby-lang Ruby 1.8.7 P22 Version Details Vulnerabilities
39 Application Ruby-lang Ruby 1.8.7 P71 Version Details Vulnerabilities
40 Application Ruby-lang Ruby 1.8.7 Preview1 Version Details Vulnerabilities
41 Application Ruby-lang Ruby 1.8.7 Preview2 Version Details Vulnerabilities
42 Application Ruby-lang Ruby 1.8.7 Version Details Vulnerabilities
43 Application Ruby-lang Ruby 1.9.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Ruby-lang Ruby 43

- References For CVE-2008-3656 CONFIRM
VUPEN ADV-2009-1297
XF ruby-webrick-dos(44371)
BUGTRAQ 20080831 rPSA-2008-0264-1 ruby
BID 30644 Ruby Multiple Security Bypass and Denial of Service Vulnerabilities Release Date:2009-05-13
SECTRACK 1020654
CERT TA09-133A
APPLE APPLE-SA-2009-05-12

- Metasploit Modules Related To CVE-2008-3656

Ruby WEBrick::HTTP::DefaultFileHandler DoS
The WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 to 1.8.6-p286, 1.8.7 to 1.8.7-p71, and 1.9 to r18423 allows for a DoS (CPU consumption) via a crafted HTTP request.
Module type : auxiliary Rank : normal

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