CVE-2021-1789
Confirmed PUBLISHEDA type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina,...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.
- CVE Published
- Apr 02, 2021
- Exploitation Reported
- May 04, 2022
- CVSS
- 8.8 High
- EPSS
- —
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Apple |
iOS and iPadOS
|
unspecified to < 14.4 |
Affected |
| Apple |
macOS
|
unspecified to < 11.2 |
Affected |
| Apple |
macOS
|
unspecified to < 7.3 |
Affected |
| Apple |
macOS
|
unspecified to < 14.4 |
Affected |
| Apple |
macOS
|
unspecified to < 14.0 |
Affected |
CVE References
- FEDORA-2021-864dc37032 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
- FEDORA-2021-619711d709 lists.fedoraproject.org · Vendor Advisory https://lists.fedoraproject.org/archives/list/package-announce%40list...
- GLSA-202104-03 security.gentoo.org · Vendor Advisory https://security.gentoo.org/glsa/202104-03
- support.apple.com/en-us/HT212147 support.apple.com · CVE Record https://support.apple.com/en-us/HT212147
- support.apple.com/en-us/HT212146 support.apple.com · CVE Record https://support.apple.com/en-us/HT212146
Show 3 more references
- support.apple.com/en-us/HT212148 support.apple.com · CVE Record https://support.apple.com/en-us/HT212148
- support.apple.com/en-us/HT212149 support.apple.com · CVE Record https://support.apple.com/en-us/HT212149
- support.apple.com/en-us/HT212152 support.apple.com · CVE Record https://support.apple.com/en-us/HT212152
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2022-05-04 00:00 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/A:P
Exploitation Status
Exploited in the wild
Recorded 2022-05-04 00:00:00 UTC · CISA
Weaknesses (CWE)
-
Access of Resource Using Incompatible Type ('Type Confusion')
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
00:00 UTC about 4 years ago00:00 UTC · about 4 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
18:01 UTC over 5 years ago18:01 UTC · over 5 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC over 5 years ago00:00 UTC · over 5 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2021-1789
{
"cve_id": "CVE-2021-1789",
"title": "A type confusion issue was addressed with improved state handling. This issue...",
"affected_vendor": "Apple",
"affected_product": "iOS and iPadOS, macOS",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 8.8,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}