5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.011 Low
EPSS
Percentile
84.7%
There is a possible object leak which can lead to a denial of service
vulnerability in Action Pack. This vulnerability has been
assigned the CVE identifier CVE-2016-0751.
Versions Affected: All.
Not affected: None.
Fixed Versions: 5.0.0.beta1.1, 4.2.5.1, 4.1.14.1, 3.2.22.1
A carefully crafted accept header can cause a global cache of mime types to
grow indefinitely which can lead to a possible denial of service attack in
Action Pack.
All users running an affected release should either upgrade or use one of the
workarounds immediately.
The FIXED releases are available at the normal locations.
This attack can be mitigated by a proxy that only allows known mime types in
the Accept header.
Placing the following code in an initializer will also mitigate the issue:
require 'action_dispatch/http/mime_type'
Mime.const_set :LOOKUP, Hash.new { |h,k|
Mime::Type.new(k) unless k.blank?
}
To aid users who aren’t able to upgrade immediately we have provided patches for
the two supported release series. They are in git-am format and consist of a
single changeset.
Please note that only the 4.1.x and 4.2.x series are supported at present. Users
of earlier unsupported releases are advised to upgrade as soon as possible as we
cannot guarantee the continued availability of security fixes for unsupported
releases.
Aaron Patterson <3<3
CPE | Name | Operator | Version |
---|---|---|---|
actionpack | lt | 5.0.0.beta1.1 | |
actionpack | le | 4.2.5.0 | |
actionpack | ge | 4.2.6.0 | |
actionpack | le | 4.1.14.0 | |
actionpack | ge | 4.1.15.0 | |
actionpack | le | 3.2.22.0 | |
actionpack | ge | 3.2.23.0 |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.011 Low
EPSS
Percentile
84.7%