Known Exploited Vulnerability
5.5
MEDIUM
CVE-2023-41991
Apple Multiple Products Improper Certificate Valid - [Actively Exploited]
Description

A certificate validation issue was addressed. This issue is fixed in macOS Ventura 13.6, iOS 16.7 and iPadOS 16.7. A malicious app may be able to bypass signature validation. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 16.7.

INFO

Published Date :

Sept. 21, 2023, 7:15 p.m.

Last Modified :

June 21, 2024, 4:15 p.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Apple iOS, iPadOS, macOS, and watchOS contain an improper certificate validation vulnerability that can allow a malicious app to bypass signature validation.

Required Action :

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes :

https://support.apple.com/en-us/HT213926, https://support.apple.com/en-us/HT213927, https://support.apple.com/en-us/HT213928, https://support.apple.com/en-us/HT213929, https://support.apple.com/en-us/HT213931

Public PoC/Exploit Available at Github

CVE-2023-41991 has a 11 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-41991 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apple macos
2 Apple iphone_os
3 Apple ipados
: Total Affected Vendor : 1 | Products : 3
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-41991.

URL Resource
https://support.apple.com/en-us/HT213927 Release Notes Vendor Advisory
https://support.apple.com/en-us/HT213931 Release Notes Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
XLsnQw/iOSre

🔥🔥🔥微信公众号:Cydiapps🔥🔥🔥 => Cydia插件 Logos语言 开发Tweak.xm Cydia Substrate 注入dylib iOS逆向工程开发 越狱Jailbreak deb插件 - fishhook / Frida / Cycript / MachOView / IDA / Hopper Disassembler / MonkeyDev / Class-dump / Theos / Reveal / Dumpdecryptd / FLEX / 汇编Assembly / CaptainHook / lldb/LLVM/XNU/Darwin/iOS Reverse

Logos Shell Makefile Python Assembly C Objective-C Swift Perl Vim Script

Updated: 1 month, 2 weeks ago
1 stars 0 fork 0 watcher
Born at : June 12, 2024, 4:41 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
myaccount20232828/fps

None

Makefile C

Updated: 5 months ago
0 stars 0 fork 0 watcher
Born at : April 17, 2024, 6:17 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
iOS17/TrollStore

TrollStore 2 (TrollHelper) - The Jailed Permasigned app installer for iOS 14.0 - 16.6.1, It help you to install any IPA file on your iPhone for FREE.

Updated: 4 weeks, 1 day ago
9 stars 0 fork 0 watcher
Born at : April 6, 2024, 1:41 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
Zenyith/CVE-2023-41991

None

C Objective-C Makefile

Updated: 3 weeks, 1 day ago
1 stars 1 fork 1 watcher
Born at : Nov. 28, 2023, 11:59 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
XLsn0w/TrollStore2

TrollStore 二代 iOS巨魔商店V2.0 安装指南: 巨魔2代安装教程 巨魔辅助安装器 Misaka TrollSpeed 状态栏网速显示

Updated: 1 week, 4 days ago
342 stars 17 fork 17 watcher
Born at : Nov. 28, 2023, 6:32 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
opa334/ChOma

C library for manipulating MachO/FAT files and their code signatures

C Makefile

Updated: 1 week, 5 days ago
315 stars 39 fork 39 watcher
Born at : Oct. 25, 2023, 2:23 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
Xample33/cvehunter

Asynchronous python wrapper for CVE/CPE data

cpe cve nist nvd security-tools vulnerability-research

Python

Updated: 1 month, 2 weeks ago
3 stars 0 fork 0 watcher
Born at : Sept. 23, 2023, 9 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
RENANZG/My-Forensics

Digital Forensics and Incident Response (DFIR)

investigator babko backdoor honeypot criminal darknet forensics encrochat omerta interception government-hacking police-hacking rasterfahndung online-durchsuchungen technocolonialism zeroday-feature equipment-interference technical-capability-notice network-investigative-technique due-diligence

Shell HTML YARA

Updated: 2 weeks, 5 days ago
91 stars 14 fork 14 watcher
Born at : Aug. 21, 2023, 8:57 p.m. This repo has been linked 19 different CVEs too.
Profile Photo
RENANZG/My-Debian-GNU-Linux

Collection of Solutions for Debian GNU/Linux End Users

debian hardening security anticensorship freedom hashcheck secure-boot dkms shim encryption keyfile openssl sbsigntool mokutil sign-file grub postmodernism

Shell C Python HTML Vim Script Perl TeX CSS PowerShell Go

Updated: 2 weeks, 2 days ago
5 stars 0 fork 0 watcher
Born at : July 14, 2023, 1:06 a.m. This repo has been linked 16 different CVEs too.
Profile Photo
Ostorlab/KEV

Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

cisa-kev vulnerability 0day cisa exploits

Updated: 1 week, 4 days ago
516 stars 32 fork 32 watcher
Born at : April 19, 2022, 8:58 a.m. This repo has been linked 1181 different CVEs too.
Profile Photo
XLsn0w/Cydiapps

🔥🔥🔥微信公众号:Cydiapps🔥🔥🔥 => Cydia插件 Logos语言 开发Tweak.xm Cydia Substrate 注入dylib iOS逆向工程开发 越狱Jailbreak deb插件 - fishhook / Frida / iOSOpenDev / Cycript / MachOView / IDA / Hopper Disassembler / MonkeyDev / Class-dump / Theos / Reveal / Dumpdecryptd / FLEX / 汇编Assembly / CaptainHook / lldb/LLVM/XNU/Darwin/iOS Reverse

cydia cydiasubstrate class-dump theos iosopendev monkeydev iosre tweak logos ida mach-o mach deb dpkg-deb captainhook dyld dylib fishhook ios objective-c

Python Shell Makefile Logos Swift C++ HTML JavaScript Rich Text Format Assembly

Updated: 1 week, 5 days ago
1051 stars 264 fork 264 watcher
Born at : Oct. 11, 2017, 5:16 a.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-41991 vulnerability anywhere in the article.

  • Help Net Security
Midnight Blizzard delivered iOS, Chrome exploits via compromised government websites

Suspected Russian hackers have been hitting iPhone and Android users visiting government websites with exploits first leveraged by commercial surveillance vendors, Google TAG researchers shared. The w ... Read more

Published Date: Aug 29, 2024 (2 weeks, 6 days ago)
CVE-2024-5274 CVE-2024-4671 CVE-2023-41993 CVE-2023-41992 CVE-2023-41991 CVE-2021-37973

The following table lists the changes that have been made to the CVE-2023-41991 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Jun. 21, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Jan. 10, 2024

    Action Type Old Value New Value
    Removed Reference Apple Inc. http://seclists.org/fulldisclosure/2023/Oct/5
    Removed Reference Apple Inc. http://seclists.org/fulldisclosure/2023/Oct/4
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Apple Inc. http://seclists.org/fulldisclosure/2023/Oct/4 [No types assigned]
  • Reanalysis by [email protected]

    Oct. 24, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.6 OR *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:ipados:17.0:*:*:*:*:*:*:* *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:iphone_os:17.0:*:*:*:*:*:*:* *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.6
  • Modified Analysis by [email protected]

    Oct. 12, 2023

    Action Type Old Value New Value
    Changed Reference Type http://seclists.org/fulldisclosure/2023/Oct/5 No Types Assigned http://seclists.org/fulldisclosure/2023/Oct/5 Mailing List, Third Party Advisory
    Changed Reference Type https://support.apple.com/en-us/HT213927 Vendor Advisory https://support.apple.com/en-us/HT213927 Release Notes, Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT213931 Vendor Advisory https://support.apple.com/en-us/HT213931 Release Notes, Vendor Advisory
    Changed CPE Configuration OR *cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:ipad_os:17.0:*:*:*:*:*:*:* *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:iphone_os:17.0:*:*:*:*:*:*:* *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.6 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 9.6.3 *cpe:2.3:o:apple:watchos:10.0.0:*:*:*:*:*:*:* OR *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.6
  • CVE Modified by [email protected]

    Oct. 03, 2023

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2023/Oct/5 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 27, 2023

    Action Type Old Value New Value
    Changed Description A certificate validation issue was addressed. This issue is fixed in iOS 16.7 and iPadOS 16.7, OS 17.0.1 and iPadOS 17.0.1, watchOS 9.6.3, macOS Ventura 13.6, watchOS 10.0.1. A malicious app may be able to bypass signature validation. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 16.7. A certificate validation issue was addressed. This issue is fixed in macOS Ventura 13.6, iOS 16.7 and iPadOS 16.7. A malicious app may be able to bypass signature validation. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 16.7.
    Removed Reference http://seclists.org/fulldisclosure/2023/Sep/14 [Third Party Advisory]
    Removed Reference http://seclists.org/fulldisclosure/2023/Sep/15 [Third Party Advisory]
    Removed Reference http://seclists.org/fulldisclosure/2023/Sep/16 [Third Party Advisory]
    Removed Reference http://seclists.org/fulldisclosure/2023/Sep/17 [Third Party Advisory]
    Removed Reference http://seclists.org/fulldisclosure/2023/Sep/19 [Third Party Advisory]
    Removed Reference https://support.apple.com/en-us/HT213926 [Vendor Advisory]
    Removed Reference https://support.apple.com/en-us/HT213928 [Vendor Advisory]
    Removed Reference https://support.apple.com/en-us/HT213929 [Vendor Advisory]
    Removed Reference https://support.apple.com/kb/HT213926 [Vendor Advisory]
  • Initial Analysis by [email protected]

    Sep. 25, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
    Changed Reference Type http://seclists.org/fulldisclosure/2023/Sep/14 No Types Assigned http://seclists.org/fulldisclosure/2023/Sep/14 Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2023/Sep/15 No Types Assigned http://seclists.org/fulldisclosure/2023/Sep/15 Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2023/Sep/16 No Types Assigned http://seclists.org/fulldisclosure/2023/Sep/16 Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2023/Sep/17 No Types Assigned http://seclists.org/fulldisclosure/2023/Sep/17 Third Party Advisory
    Changed Reference Type http://seclists.org/fulldisclosure/2023/Sep/19 No Types Assigned http://seclists.org/fulldisclosure/2023/Sep/19 Third Party Advisory
    Changed Reference Type https://support.apple.com/en-us/HT213926 No Types Assigned https://support.apple.com/en-us/HT213926 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT213927 No Types Assigned https://support.apple.com/en-us/HT213927 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT213928 No Types Assigned https://support.apple.com/en-us/HT213928 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT213929 No Types Assigned https://support.apple.com/en-us/HT213929 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT213931 No Types Assigned https://support.apple.com/en-us/HT213931 Vendor Advisory
    Changed Reference Type https://support.apple.com/kb/HT213926 No Types Assigned https://support.apple.com/kb/HT213926 Vendor Advisory
    Added CWE NIST CWE-295
    Added CPE Configuration OR *cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:ipad_os:17.0:*:*:*:*:*:*:* *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 16.7 *cpe:2.3:o:apple:iphone_os:17.0:*:*:*:*:*:*:* *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.6 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 9.6.3 *cpe:2.3:o:apple:watchos:10.0.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Sep. 23, 2023

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2023/Sep/19 [No Types Assigned]
    Added Reference http://seclists.org/fulldisclosure/2023/Sep/17 [No Types Assigned]
    Added Reference http://seclists.org/fulldisclosure/2023/Sep/16 [No Types Assigned]
    Added Reference http://seclists.org/fulldisclosure/2023/Sep/15 [No Types Assigned]
    Added Reference http://seclists.org/fulldisclosure/2023/Sep/14 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 21, 2023

    Action Type Old Value New Value
    Added Reference https://support.apple.com/kb/HT213926 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-41991 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-41991 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

1.45 }} -0.75%

score

0.86965

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: