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Fix Stored XSS in Browser Details and Core Filters

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This commit is contained in:
zinduolis
2026-02-26 11:20:30 +10:00
parent e3a668e258
commit 70ec0de175
3 changed files with 43 additions and 14 deletions
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2
core/filters/base.rb
View File

@@ -187,7 +187,7 @@ module BeEF
def self.has_valid_browser_details_chars?(str)
return false unless is_non_empty_string?(str)
!(str =~ %r{[^\w\d\s()-.,;:_/!\302\256]}).nil?
(str =~ %r{[^\w\d\s()-.,;:_/!\302\256]}).nil?
end
# Check for valid base details characters

10
core/filters/browser.rb
View File

@@ -11,7 +11,7 @@ module BeEF
def self.is_valid_browsername?(str) # rubocop:disable Naming/PredicatePrefix
return false unless is_non_empty_string?(str)
return false if str.length > 2
return false if has_non_printable_char?(str)
return false unless has_valid_browser_details_chars?(str)
true
end
@@ -21,7 +21,7 @@ module BeEF
# @return [Boolean] If the string has valid Operating System name characters
def self.is_valid_osname?(str) # rubocop:disable Naming/PredicatePrefix
return false unless is_non_empty_string?(str)
return false if has_non_printable_char?(str)
return false unless has_valid_browser_details_chars?(str)
return false if str.length < 2
true
@@ -32,7 +32,7 @@ module BeEF
# @return [Boolean] If the string has valid Hardware name characters
def self.is_valid_hwname?(str) # rubocop:disable Naming/PredicatePrefix
return false unless is_non_empty_string?(str)
return false if has_non_printable_char?(str)
return false unless has_valid_browser_details_chars?(str)
return false if str.length < 2
true
@@ -71,7 +71,7 @@ module BeEF
# @return [Boolean] If the string has valid browser / ua string characters
def self.is_valid_browserstring?(str) # rubocop:disable Naming/PredicatePrefix
return false unless is_non_empty_string?(str)
return false if has_non_printable_char?(str)
return false unless has_valid_browser_details_chars?(str)
return false if str.length > 300
true
@@ -93,7 +93,7 @@ module BeEF
# @return [Boolean] If the string has valid system platform characters
def self.is_valid_system_platform?(str) # rubocop:disable Naming/PredicatePrefix
return false unless is_non_empty_string?(str)
return false if has_non_printable_char?(str)
return false unless has_valid_browser_details_chars?(str)
return false if str.length > 200
true

45
core/main/handlers/browserdetails.rb
View File

@@ -44,7 +44,7 @@ module BeEF
# hooked window host name
log_zombie_port = 0
if !@data['results']['browser.window.hostname'].nil?
if !@data['results']['browser.window.hostname'].nil? && BeEF::Filters.is_valid_hostname?(@data['results']['browser.window.hostname'])
log_zombie_domain = @data['results']['browser.window.hostname']
elsif !@data['request'].referer.nil? and !@data['request'].referer.empty?
referer = @data['request'].referer
@@ -59,7 +59,7 @@ module BeEF
end
# hooked window host port
if @data['results']['browser.window.hostport'].nil?
if @data['results']['browser.window.hostport'].nil? || !BeEF::Filters.is_valid_port?(@data['results']['browser.window.hostport'].to_s)
log_zombie_domain_parts = log_zombie_domain.split(':')
log_zombie_port = log_zombie_domain_parts[1].to_i if log_zombie_domain_parts.length > 1
else
@@ -92,6 +92,7 @@ module BeEF
BD.set(session_id, 'browser.name.friendly', browser_friendly_name)
else
err_msg "Invalid browser name returned from the hook browser's initial connection."
browser_name = 'Unknown'
end
if BeEF::Filters.is_valid_ip?(zombie.ip)
@@ -242,11 +243,17 @@ module BeEF
X_FORWARDED
X_FORWARDED_FOR
].each do |header|
proxy_clients << (JSON.parse(zombie.httpheaders)[header]).to_s unless JSON.parse(zombie.httpheaders)[header].nil?
val = JSON.parse(zombie.httpheaders)[header]
unless val.nil?
val.to_s.split(',').each do |ip|
proxy_clients << ip.strip if BeEF::Filters.is_valid_ip?(ip.strip)
end
end
end
# retrieve proxy server
proxy_server = JSON.parse(zombie.httpheaders)['VIA'] unless JSON.parse(zombie.httpheaders)['VIA'].nil?
proxy_server = nil unless proxy_server.nil? || BeEF::Filters.has_valid_browser_details_chars?(proxy_server)
# store and log proxy details
if using_proxy == true
@@ -273,6 +280,7 @@ module BeEF
BD.set(session_id, 'browser.version', browser_version)
else
err_msg "Invalid browser version returned from the hook browser's initial connection."
browser_version = 'Unknown'
end
# get and store browser string
@@ -293,7 +301,12 @@ module BeEF
# get and store browser language
browser_lang = get_param(@data['results'], 'browser.language')
BD.set(session_id, 'browser.language', browser_lang)
if BeEF::Filters.has_valid_browser_details_chars?(browser_lang)
BD.set(session_id, 'browser.language', browser_lang)
else
err_msg "Invalid browser language returned from the hook browser's initial connection."
browser_lang = 'Unknown'
end
# get and store the cookies
cookies = get_param(@data['results'], 'browser.window.cookies')
@@ -309,6 +322,7 @@ module BeEF
BD.set(session_id, 'host.os.name', os_name)
else
err_msg "Invalid operating system name returned from the hook browser's initial connection."
os_name = 'Unknown'
end
# get and store the OS family
@@ -322,15 +336,30 @@ module BeEF
# get and store the OS version
# - without checks as it can be very different, for instance on linux/bsd)
os_version = get_param(@data['results'], 'host.os.version')
BD.set(session_id, 'host.os.version', os_version)
if BeEF::Filters.has_valid_browser_details_chars?(os_version)
BD.set(session_id, 'host.os.version', os_version)
else
err_msg "Invalid operating system version returned from the hook browser's initial connection."
os_version = 'Unknown'
end
# get and store the OS arch - without checks
# get and store the OS arch
os_arch = get_param(@data['results'], 'host.os.arch')
BD.set(session_id, 'host.os.arch', os_arch)
if BeEF::Filters.has_valid_browser_details_chars?(os_arch)
BD.set(session_id, 'host.os.arch', os_arch)
else
err_msg "Invalid operating system architecture returned from the hook browser's initial connection."
os_arch = 'Unknown'
end
# get and store default browser
default_browser = get_param(@data['results'], 'host.software.defaultbrowser')
BD.set(session_id, 'host.software.defaultbrowser', default_browser)
if BeEF::Filters.has_valid_browser_details_chars?(default_browser)
BD.set(session_id, 'host.software.defaultbrowser', default_browser)
else
err_msg "Invalid default browser returned from the hook browser's initial connection."
default_browser = 'Unknown'
end
# get and store the hardware type
hw_type = get_param(@data['results'], 'hardware.type')