VDB-185728 · CVE-2021-30823 · Nessus 236537

Apple iOS/iPadOS HSTS cleartext transmission

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Apple iOS and iPadOS and classified as problematic. This issue affects some unknown processing of the component HSTS Handler. Executing a manipulation can lead to cleartext transmission. This vulnerability appears as CVE-2021-30823. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apple iOS and iPadOS (Smartphone Operating System) (the affected version is unknown) and classified as problematic. This vulnerability affects an unknown code of the component HSTS Handler. The manipulation with an unknown input leads to a cleartext transmission vulnerability. The CWE definition for the vulnerability is CWE-319. The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. As an impact it is known to affect confidentiality.

The weakness was presented 10/29/2021. The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2021-30823 since 04/13/2021. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/22/2025). It is expected to see the exploit prices for this product increasing in the near future.The MITRE ATT&CK project declares the attack technique as T1040.

The vulnerability scanner Nessus provides a plugin with the ID 236537 (Alibaba Cloud Linux 3 : 0162: webkit2gtk3 (ALINUX3-SA-2022:0162)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236537). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Smartphone Operating System

Vendor

Apple

Name

License

commercial

Website

Vendor: https://www.apple.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cleartext transmission
CWE: CWE-319 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 236537
Nessus Name: Alibaba Cloud Linux 3 : 0162: webkit2gtk3 (ALINUX3-SA-2022:0162)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/13/2021 🔍
10/29/2021 +199 days 🔍
10/29/2021 +0 days 🔍
05/22/2025 +1301 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2021-30823 (🔍)
GCVE (CVE): GCVE-0-2021-30823
GCVE (VulDB): GCVE-100-185728
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 10/29/2021 07:02
Updated: 05/22/2025 02:08
Changes: 10/29/2021 07:02 (39), 11/03/2021 09:41 (1), 05/22/2025 02:08 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.