Home/CVE/Apple Multiple Products Integer Overflow Vulnerability
CVE

CVE-2021-30860

Apple Multiple Products Integer Overflow Vulnerability

An integer overflow was addressed with improved input validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. Processing a maliciously crafted PDF may lead to arbitrary code execution.

Apple is aware of a report that this issue may have been actively exploited.

HIGH · CVSS 7.8 ⚠ CISA KEV EPSS 0.71973
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

◆

Threat Actors Linked

3
actorNSO Group / Pegasus
actorOperation Triangulation
actorQuaDream / Reign
⬡

Weakness Classification

CWE-190Integer Overflow or Wraparound
CWE-190Integer Overflow or Wraparound
▤

Affected Products & Versions

9
apple ipados< 14.8
apple iphone os< 12.5.5
apple iphone os>= 13.0 and < 14.8
apple mac os x>= 10.15 and < 10.15.7
apple mac os xall versions
apple macos< 11.6
apple watchos< 7.6.2
xpdfreader xpdf< 4.04
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · product-security@apple.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD24 Aug 2021 · 07:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

4
rhsaRHSA-2023:2810Moderate
rhsaRHSA-2023:2259Moderate
rhsaRHBA-2024:8405Moderate
cisaKEV-CVE-2021-30860
🔗

References & Sources

16
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2021/Sep/25Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/26Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/27Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/28Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/38Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/39Mailing ListThird Party Advisory
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