Vulnerability CVE-2021-30773

Vulnerability Name:

CVE-2021-30773 (CCN-206138)

Assigned:

2021-07-21

Published:

2021-07-21

Updated:

2021-09-17

Summary:

An issue in code signature validation was addressed with improved checks. This issue is fixed in iOS 14.7, tvOS 14.7, watchOS 7.6. A malicious application may be able to bypass code signing checks.

CVSS v3 Severity:

5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): High Availibility (A): None

5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): High Availibility (A): None

CVSS v2 Severity:

4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:C/A:N)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): Complete Availibility (A): None

Vulnerability Type:

CWE-noinfo

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2021-30773

Source: XF
Type: UNKNOWN
apple-watchos-cve202130773-sec-bypass(206138)

Source: MISC
Type: Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212601

Source: MISC
Type: Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212604

Source: CCN
Type: Apple security document HT212605
About the security content of watchOS 7.6

Source: MISC
Type: Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212605

Vulnerable Configuration:

Configuration 1:

cpe:/o:apple:iphone_os:*:*:*:*:*:*:*:* (Version < 14.7)

OR cpe:/o:apple:tvos:*:*:*:*:*:*:*:* (Version < 14.7)

OR cpe:/o:apple:watchos:*:*:*:*:*:*:*:* (Version < 7.6)

Configuration CCN 1:

cpe:/o:apple:watchos:7.5:*:*:*:*:*:*:*

Denotes that component is vulnerable

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