CVE-2023-42917

criticalknown exploitedcovered by 1 sourcefirst seen 2023-12-04

Actively exploited. CVE-2023-42917 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-12-04) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Apple iOS, iPadOS, macOS, and Safari WebKit contain a memory corruption vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

CSIRTS triage

vendor: Apple Memory corruption

What: A memory corruption vulnerability in WebKit can lead to code execution when processing malicious web content.
Who is affected: Users of Apple iOS, iPadOS, macOS, and Safari are affected by this vulnerability.
Urgency: Immediate remediation is necessary due to active exploitation and critical severity.
Action: Apply the latest updates for affected Apple products.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 95% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalexploitedCVE-2023-42917: Apple Multiple Products WebKit Memory Corruption Vulnerabilitycisa-kev · 2023-12-04

External references

NVD record for CVE-2023-42917

CVE.org record

CISA KEV catalog

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