Known exploited vulnerability
CVE-2023-42917
The short answer
CVE-2023-42917 affects Apple Safari and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-12-04: attackers are using it, so patch it first.
What it is
A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.
Weakness: CWE-787.
Severity
8.8 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Dec 4, 2023
Federal due date Dec 25, 2023
EPSS, next 30 days
9.3%
Higher than 95% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected products
Safari, macOS, iOS and iPadOS. NVD's record lists the exact affected versions.
References
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AD2KIHHCUBQC2YYH3FJWAHI5BG3QETOH/ Mailing List
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P5LQS6VEI7VIZNC7QGQ62EOV45R5RJIR/ Mailing List
- security.gentoo.org/glsa/202401-04 Third Party Advisory
- support.apple.com/en-us/HT214031 Vendor Advisory
- support.apple.com/en-us/HT214032 Vendor Advisory
- support.apple.com/en-us/HT214033 Vendor Advisory
- support.apple.com/kb/HT214033 Vendor Advisory
- support.apple.com/kb/HT214034 Vendor Advisory
- support.apple.com/kb/HT214062 Vendor Advisory
- www.debian.org/security/2023/dsa-5575 Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AD2KIHHCUBQC2YYH3FJWAHI5BG3QETOH/ Mailing List
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P5LQS6VEI7VIZNC7QGQ62EOV45R5RJIR/ Mailing List
Questions
Is CVE-2023-42917 being exploited?
Yes. CISA added CVE-2023-42917 to its Known Exploited Vulnerabilities catalog on 2023-12-04, with a federal remediation due date of 2023-12-25.
How do I fix CVE-2023-42917?
CISA's required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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