PT-2018-3276 · Ruby+5 · Ruby+5
Aerodudrizzt
·
Published
2018-03-28
·
Updated
2020-06-09
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CVE-2018-8778
CVSS v2.0
7.8
High
| Vector | AV:N/AC:L/Au:N/C:C/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Ruby versions prior to 2.2.10
Ruby versions 2.3.x prior to 2.3.7
Ruby versions 2.4.x prior to 2.4.4
Ruby versions 2.5.x prior to 2.5.1
Ruby version 2.6.0-preview1
Description
The issue is related to the String#unpack method in Ruby, where an attacker controlling the unpacking format can trigger a buffer under-read, resulting in a massive and controlled information disclosure. This is similar to format string vulnerabilities. The vulnerability can be exploited by a remote attacker to disclose protected information.
Recommendations
For Ruby versions prior to 2.2.10, update to version 2.2.10 or later.
For Ruby versions 2.3.x prior to 2.3.7, update to version 2.3.7 or later.
For Ruby versions 2.4.x prior to 2.4.4, update to version 2.4.4 or later.
For Ruby versions 2.5.x prior to 2.5.1, update to version 2.5.1 or later.
For Ruby version 2.6.0-preview1, update to a later version.
As a temporary workaround, consider restricting the use of the
String#unpack method until a patch is available.Exploit
Fix
Use of Externally-Controlled Format String
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Red Hat
Ruby
Suse
Ubuntu