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Vulnerability details: VCID-8ax3-qacn-hyeg
Vulnerability ID VCID-8ax3-qacn-hyeg
Aliases CVE-2018-4233
Summary Multiple vulnerabilities have been found in WebKitGTK+, the worst of which may lead to arbitrary code execution.
Status Published
Exploitability 2.0
Weighted Severity 7.9
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
cvssv3.1 8.8 http://packetstormsecurity.com/files/153148/Safari-Webkit-Proxy-Object-Type-Confusion.html
ssvc Track* http://packetstormsecurity.com/files/153148/Safari-Webkit-Proxy-Object-Type-Confusion.html
epss 0.89897 https://api.first.org/data/v1/epss?cve=CVE-2018-4233
epss 0.89897 https://api.first.org/data/v1/epss?cve=CVE-2018-4233
epss 0.89897 https://api.first.org/data/v1/epss?cve=CVE-2018-4233
epss 0.89897 https://api.first.org/data/v1/epss?cve=CVE-2018-4233
epss 0.89897 https://api.first.org/data/v1/epss?cve=CVE-2018-4233
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2018-4233
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2018-4233
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2018-4233
cvssv3.1 8.8 https://security.gentoo.org/glsa/201808-04
ssvc Track* https://security.gentoo.org/glsa/201808-04
cvssv3.1 8.8 https://support.apple.com/HT208848
ssvc Track* https://support.apple.com/HT208848
cvssv3.1 8.8 https://support.apple.com/HT208850
ssvc Track* https://support.apple.com/HT208850
cvssv3.1 8.8 https://support.apple.com/HT208851
ssvc Track* https://support.apple.com/HT208851
cvssv3.1 8.8 https://support.apple.com/HT208852
ssvc Track* https://support.apple.com/HT208852
cvssv3.1 8.8 https://support.apple.com/HT208853
ssvc Track* https://support.apple.com/HT208853
cvssv3.1 8.8 https://support.apple.com/HT208854
ssvc Track* https://support.apple.com/HT208854
cvssv3.1 8.8 https://usn.ubuntu.com/3687-1/
ssvc Track* https://usn.ubuntu.com/3687-1/
cvssv3.1 8.8 https://www.exploit-db.com/exploits/45998/
ssvc Track* https://www.exploit-db.com/exploits/45998/
cvssv3.1 8.8 http://www.securitytracker.com/id/1041029
ssvc Track* http://www.securitytracker.com/id/1041029
Reference id Reference type URL
http://packetstormsecurity.com/files/153148/Safari-Webkit-Proxy-Object-Type-Confusion.html
https://api.first.org/data/v1/epss?cve=CVE-2018-4233
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4233
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://support.apple.com/HT208848
https://support.apple.com/HT208850
https://support.apple.com/HT208851
https://support.apple.com/HT208852
https://support.apple.com/HT208853
https://support.apple.com/HT208854
https://www.exploit-db.com/exploits/45998/
http://www.securitytracker.com/id/1041029
cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:*
cpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:*
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
CVE-2018-4233 https://nvd.nist.gov/vuln/detail/CVE-2018-4233
CVE-2018-4404;CVE-2018-4233 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/macos/remote/45998.rb
CVE-2018-4404;CVE-2018-4233 Exploit https://raw.githubusercontent.com/rapid7/metasploit-framework/cc7cb7302ef43478292f684f473fadb00f9b4344/modules/exploits/osx/browser/safari_proxy_object_type_confusion.rb
GLSA-201808-04 https://security.gentoo.org/glsa/201808-04
USN-3687-1 https://usn.ubuntu.com/3687-1/
Data source Exploit-DB
Date added Dec. 14, 2018
Description Safari - Proxy Object Type Confusion (Metasploit)
Ransomware campaign use Known
Source publication date Dec. 14, 2018
Exploit type remote
Platform macos
Source update date Dec. 14, 2018
Source URL https://raw.githubusercontent.com/rapid7/metasploit-framework/cc7cb7302ef43478292f684f473fadb00f9b4344/modules/exploits/osx/browser/safari_proxy_object_type_confusion.rb
Data source Metasploit
Description This module exploits a type confusion bug in the Javascript Proxy object in WebKit. The DFG JIT does not take into account that, through the use of a Proxy, it is possible to run arbitrary JS code during the execution of a CreateThis operation. This makes it possible to change the structure of e.g. an argument without causing a bailout, leading to a type confusion (CVE-2018-4233). The JIT region is then replaced with shellcode which loads the second stage. The second stage exploits a logic error in libxpc, which uses command execution via the launchd's "spawn_via_launchd" API (CVE-2018-4404).
Note 
Reliability:
  - unknown-reliability
Stability:
  - unknown-stability
SideEffects:
  - unknown-side-effects
Ransomware campaign use Unknown
Source publication date March 15, 2018
Platform OSX,Python,Unix
Source URL https://github.com/rapid7/metasploit-framework/tree/master/modules/exploits/osx/browser/safari_proxy_object_type_confusion.rb
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at http://packetstormsecurity.com/files/153148/Safari-Webkit-Proxy-Object-Type-Confusion.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at http://packetstormsecurity.com/files/153148/Safari-Webkit-Proxy-Object-Type-Confusion.html
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-4233
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-4233
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-4233
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://security.gentoo.org/glsa/201808-04
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://security.gentoo.org/glsa/201808-04
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://support.apple.com/HT208848
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://support.apple.com/HT208848
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://support.apple.com/HT208850
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://support.apple.com/HT208850
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://support.apple.com/HT208851
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://support.apple.com/HT208851
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://support.apple.com/HT208852
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://support.apple.com/HT208852
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://support.apple.com/HT208853
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://support.apple.com/HT208853
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://support.apple.com/HT208854
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://support.apple.com/HT208854
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://usn.ubuntu.com/3687-1/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://usn.ubuntu.com/3687-1/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.exploit-db.com/exploits/45998/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at https://www.exploit-db.com/exploits/45998/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at http://www.securitytracker.com/id/1041029
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-06-03T13:13:53Z/ Found at http://www.securitytracker.com/id/1041029
Exploit Prediction Scoring System (EPSS)
Percentile 0.99571
EPSS Score 0.89897
Published At April 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:12:31.963905+00:00 Gentoo Importer Import https://security.gentoo.org/glsa/201808-04 38.0.0