CVE-2020-27950
Confirmed PUBLISHEDA memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.
- CVE Published
- Dec 08, 2020
- Exploitation Reported
- Nov 03, 2021
- CVSS
- 5.5 Medium
- EPSS
- —
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Apple |
watchOS
|
unspecified to < 7.1 |
Affected |
| Apple |
iOS and iPadOS
|
unspecified to < 14.2 |
Affected |
| Apple |
macOS
|
unspecified to < 11.0 |
Affected |
| Apple |
macOS
|
unspecified to < 12.4 |
Affected |
| Apple |
macOS
|
unspecified to < 6.2 |
Affected |
| Apple |
macOS
|
unspecified to < 5.3 |
Affected |
| Apple |
macOS
|
unspecified to < 2020 |
Affected |
| Apple |
macOS
|
unspecified to < 10.15 |
Affected |
CVE References
- 20201215 APPLE-SA-2020-12-14-4 Additional information for APPLE-SA-2020-11-13-1 macOS Big Sur 11.0.1 seclists.org · Mailing List http://seclists.org/fulldisclosure/2020/Dec/32
- support.apple.com/en-us/HT211931 support.apple.com · CVE Record https://support.apple.com/en-us/HT211931
- support.apple.com/en-us/HT211928 support.apple.com · CVE Record https://support.apple.com/en-us/HT211928
- support.apple.com/en-us/HT211929 support.apple.com · CVE Record https://support.apple.com/en-us/HT211929
- support.apple.com/en-us/HT211940 support.apple.com · CVE Record https://support.apple.com/en-us/HT211940
Show 5 more references
- support.apple.com/en-us/HT211944 support.apple.com · CVE Record https://support.apple.com/en-us/HT211944
- support.apple.com/en-us/HT211945 support.apple.com · CVE Record https://support.apple.com/en-us/HT211945
- support.apple.com/en-us/HT211946 support.apple.com · CVE Record https://support.apple.com/en-us/HT211946
- support.apple.com/en-us/HT211947 support.apple.com · CVE Record https://support.apple.com/en-us/HT211947
- packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-Trailer... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/161296/XNU-Kernel-Mach-Message-T...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- 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 | 2021-11-03 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:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
AV:N/AC:M/Au:N/C:C/I:N/A:N
Exploitation Status
Exploited in the wild
Recorded 2021-11-03 00:00:00 UTC · CISA
Proof of concept available
Recorded 2020-12-01 15:49:07 UTC · GitHub
Weaknesses (CWE)
-
Improper Initialization
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
00:00 UTC over 4 years ago00:00 UTC · over 4 years ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
20:17 UTC over 5 years ago20:17 UTC · over 5 years ago
CVE published
Vulnerability disclosed publicly
-
15:49 UTC over 5 years ago15:49 UTC · over 5 years ago
Public PoC available
Public proof-of-concept code published
-
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-2020-27950
{
"cve_id": "CVE-2020-27950",
"title": "A memory initialization issue was addressed. This issue is fixed in macOS Big...",
"affected_vendor": "Apple",
"affected_product": "watchOS, iOS and iPadOS, macOS",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 5.5,
"epss_score": null,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}