Apple Safari up to 14.1.0 WebRTC null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Apple Safari up to 14.1.0. This impacts an unknown function of the component WebRTC. Such manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2021-23841. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple Safari up to 14.1.0 (Web Browser). It has been rated as problematic. Affected by this issue is an unknown functionality of the component WebRTC. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The weakness was presented 05/24/2021 by Tavis Ormandy as HT212534 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is handled as CVE-2021-23841. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The advisory points out:

A remote attacker may be able to cause a denial of service

The vulnerability scanner Nessus provides a plugin with the ID 211827 (Oracle Linux 9 : edk2 (ELSA-2024-12842)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 14.1.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A null pointer dereference was addressed with improved input validation.

The vulnerability is also documented in the databases at Tenable (211827) and CERT Bund (WID-SEC-2022-0669). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source CentOS
  • Open Source OpenSSL
  • Debian Linux
  • Amazon Linux 2
  • FreeBSD Project FreeBSD OS
  • Juniper JUNOS
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Hitachi Command Suite
  • Gentoo Linux
  • Open Source Arch Linux
  • Avaya Aura Communication Manager
  • Avaya Aura Session Manager
  • Avaya Aura Application Enablement Services
  • Avaya Aura System Manager
  • Avaya Web License Manager
  • Pulse Secure Pulse Connect Secure
  • HCL BigFix
  • Hitachi Ops Center
  • Open Source Node.js
  • Meinberg LANTIME
  • Tenable Security Nessus
  • Netscout Arbor AED
  • Netscout Arbor APS
  • Netscout Arbor Sightline
  • Netscout Arbor TMS
  • Tenable Security Nessus Network Monitor
  • HPE Fabric OS
  • Hitachi Configuration Manager
  • F5 BIG-IP
  • Trellix ePolicy Orchestrator
  • IBM Rational Build Forge
  • Dell NetWorker
  • SolarWinds Platform
  • F5 F5OS

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 211827
Nessus Name: Oracle Linux 9 : edk2 (ELSA-2024-12842)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Safari 14.1.1

Timelineinfo

01/12/2021 🔍
05/24/2021 +131 days 🔍
05/24/2021 +0 days 🔍
05/25/2021 +1 days 🔍
02/06/2026 +1718 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT212534
Researcher: Tavis Ormandy
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-23841 (🔍)
GCVE (CVE): GCVE-0-2021-23841
GCVE (VulDB): GCVE-100-175778
CERT Bund: WID-SEC-2022-0669 - OpenSSL: Mehrere Schwachstellen

Entryinfo

Created: 05/25/2021 14:41
Updated: 02/06/2026 13:36
Changes: 05/25/2021 14:41 (19), 05/25/2021 14:44 (27), 05/28/2021 18:37 (6), 05/28/2021 18:44 (18), 06/22/2024 10:47 (17), 11/26/2024 09:59 (2), 05/03/2025 18:53 (3), 02/06/2026 13:36 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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