Vulnerability Name:

CVE-2011-5036 (CCN-72014)

Assigned:2011-12-28
Published:2011-12-28
Updated:2013-10-31
Summary:Rack before 1.1.3, 1.2.x before 1.2.5, and 1.3.x before 1.3.6 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
CVSS v3 Severity:5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
3.7 Low (Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
3.7 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-310
Vulnerability Consequences:Denial of Service
References:Source: BUGTRAQ
Type: UNKNOWN
20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table

Source: MITRE
Type: CNA
CVE-2011-5036

Source: CCN
Type: Rack Web site
Rack: a Ruby Webserver Interface

Source: CCN
Type: Rack Web page
Rack

Source: CCN
Type: SA47414
Rack Web Form Hash Collision Denial of Service Vulnerability

Source: DEBIAN
Type: UNKNOWN
DSA-2783

Source: DEBIAN
Type: DSA-2783
librack-ruby -- several vulnerabilities

Source: CCN
Type: US-CERT VU#903934
Hash table implementations vulnerable to algorithmic complexity attacks

Source: CERT-VN
Type: US Government Resource
VU#903934

Source: CCN
Type: n.runs-SA-2011.004
Denial of Service through hash table multi-collisions

Source: MISC
Type: UNKNOWN
http://www.nruns.com/_downloads/advisory28122011.pdf

Source: CCN
Type: oCERT-2011-003
multiple implementations denial-of-service via hash algorithm collision

Source: MISC
Type: UNKNOWN
http://www.ocert.org/advisories/ocert-2011-003.html

Source: CCN
Type: OSVDB ID: 78121
Rack Hash Collision Form Parameter Parsing Remote DoS

Source: CCN
Type: BID-51197
Rack Hash Collision Denial Of Service Vulnerability

Source: XF
Type: UNKNOWN
rack-hash-dos(72014)

Source: CONFIRM
Type: Exploit
https://gist.github.com/52bbc6b9cc19ce330829

Vulnerable Configuration:Configuration 1:
  • cpe:/a:rack_project:rack:*:*:*:*:*:*:*:* (Version <= 1.1.0)
  • OR cpe:/a:rack_project:rack:1.2.0:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.2.1:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.2.2:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.2.3:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.2.4:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.3.0:-:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.3.1:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.3.2:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.3.3:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.3.4:*:*:*:*:*:*:*
  • OR cpe:/a:rack_project:rack:1.3.5:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.mitre.oval:def:29014
    P
    		DSA-2783-2 -- librack-ruby -- several vulnerabilities
    2015-08-17
    oval:org.mitre.oval:def:19513
    P
    		DSA-2783-1 librack-ruby - several
    2014-06-23
    oval:com.ubuntu.xenial:def:201150360000000
    V
    		CVE-2011-5036 on Ubuntu 16.04 LTS (xenial) - medium.
    2011-12-30
    oval:com.ubuntu.precise:def:20115036000
    V
    		CVE-2011-5036 on Ubuntu 12.04 LTS (precise) - medium.
    2011-12-29
    oval:com.ubuntu.trusty:def:20115036000
    V
    		CVE-2011-5036 on Ubuntu 14.04 LTS (trusty) - medium.
    2011-12-29
    oval:com.ubuntu.xenial:def:20115036000
    V
    		CVE-2011-5036 on Ubuntu 16.04 LTS (xenial) - medium.
    2011-12-29
    BACK
    rack_project rack *
    rack_project rack 1.2.0
    rack_project rack 1.2.1
    rack_project rack 1.2.2
    rack_project rack 1.2.3
    rack_project rack 1.2.4
    rack_project rack 1.3.0
    rack_project rack 1.3.1
    rack_project rack 1.3.2
    rack_project rack 1.3.3
    rack_project rack 1.3.4
    rack_project rack 1.3.5