Apple iCloud up to 11.4 on Windows libxml2 use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability has been found in Apple iCloud up to 11.4 on Windows and classified as critical. Affected is an unknown function of the component libxml2. This manipulation causes use after free. This vulnerability is tracked as CVE-2020-27917. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Apple iCloud up to 11.4 on Windows (Cloud Software). Affected by this vulnerability is an unknown part of the component libxml2. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 12/02/2020 by OSS-Fuzz as HT211935 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is known as CVE-2020-27917. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The advisory points out:

Processing maliciously crafted web content may lead to code execution

Upgrading to version 11.5 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A use after free issue was addressed with improved memory management.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: iCloud 11.5

Timelineinfo

10/27/2020 🔍
12/02/2020 +36 days 🔍
12/02/2020 +0 days 🔍
12/06/2020 +4 days 🔍
12/13/2020 +6 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT211935
Researcher: OSS-Fuzz
Status: Confirmed

CVE: CVE-2020-27917 (🔍)
GCVE (CVE): GCVE-0-2020-27917
GCVE (VulDB): GCVE-100-165637

Entryinfo

Created: 12/06/2020 17:42
Updated: 12/13/2020 00:29
Changes: 12/06/2020 17:42 (19), 12/06/2020 17:46 (28), 12/13/2020 00:24 (5), 12/13/2020 00:29 (18)
Complete: 🔍
Cache ID: 216::103

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