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ubuntucveUbuntu.comUB:CVE-2011-4815
HistoryDec 29, 2011 - 12:00 a.m.

CVE-2011-4815

2011-12-2900:00:00
ubuntu.com
ubuntu.com
16

CVSS2

7.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

EPSS

0.02

Percentile

88.9%

JSON

Ruby (aka CRuby) before 1.8.7-p357 computes hash values without restricting
the ability to trigger hash collisions predictably, which allows
context-dependent attackers to cause a denial of service (CPU consumption)
via crafted input to an application that maintains a hash table.

Notes

Author Note
mdeslaur ruby 1.9+ randomizes hash
OSVersionArchitecturePackageVersionFilename
ubuntu10.04noarchruby1.8< 1.8.7.249-2ubuntu0.1UNKNOWN
ubuntu10.10noarchruby1.8< 1.8.7.299-2ubuntu0.1UNKNOWN
ubuntu11.04noarchruby1.8< 1.8.7.302-2ubuntu0.1UNKNOWN
ubuntu11.10noarchruby1.8< 1.8.7.352-2ubuntu0.1UNKNOWN

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CVSS2

7.8

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

EPSS

0.02

Percentile

88.9%

JSON
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