Headline
Apple Security Advisory 2023-07-24-6
Apple Security Advisory 2023-07-24-6 - macOS Big Sur 11.7.9 addresses code execution, out of bounds read, and use-after-free vulnerabilities.
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APPLE-SA-2023-07-24-6 macOS Big Sur 11.7.9
macOS Big Sur 11.7.9 addresses the following issues.
Information about the security content is also available at
https://support.apple.com/kb/HT213845.
Apple maintains a Security Updates page at
https://support.apple.com/HT201222 which lists recent
software updates with security advisories.
Assets
Available for: macOS Big Sur
Impact: An app may be able to modify protected parts of the file system
Description: This issue was addressed with improved data protection.
CVE-2023-35983: Mickey Jin (@patch1t)
curl
Available for: macOS Big Sur
Impact: Multiple issues in curl
Description: Multiple issues were addressed by updating curl.
CVE-2023-28319
CVE-2023-28320
CVE-2023-28321
CVE-2023-28322
Grapher
Available for: macOS Big Sur
Impact: Processing a file may lead to unexpected app termination or
arbitrary code execution
Description: The issue was addressed with improved checks.
CVE-2023-36854: Bool of YunShangHuaAn(云上华安)
CVE-2023-32418: Bool of YunShangHuaAn(云上华安)
Kernel
Available for: macOS Big Sur
Impact: An app may be able to execute arbitrary code with kernel
privileges
Description: A use-after-free issue was addressed with improved memory
management.
CVE-2023-32381: an anonymous researcher
CVE-2023-32433: Zweig of Kunlun Lab
CVE-2023-35993: Kaitao Xie and Xiaolong Bai of Alibaba Group
Kernel
Available for: macOS Big Sur
Impact: An app may be able to modify sensitive kernel state. Apple is
aware of a report that this issue may have been actively exploited
against versions of iOS released before iOS 15.7.1.
Description: This issue was addressed with improved state management.
CVE-2023-38606: Valentin Pashkov, Mikhail Vinogradov, Georgy Kucherin
(@kucher1n), Leonid Bezvershenko (@bzvr_), and Boris Larin (@oct0xor) of
Kaspersky
Kernel
Available for: macOS Big Sur
Impact: An app may be able to execute arbitrary code with kernel
privileges
Description: The issue was addressed with improved memory handling.
CVE-2023-32441: Peter Nguyễn Vũ Hoàng (@peternguyen14) of STAR Labs SG
Pte. Ltd.
libxpc
Available for: macOS Big Sur
Impact: An app may be able to gain root privileges
Description: A path handling issue was addressed with improved
validation.
CVE-2023-38565: Zhipeng Huo (@R3dF09) of Tencent Security Xuanwu Lab
(xlab.tencent.com)
libxpc
Available for: macOS Big Sur
Impact: An app may be able to cause a denial-of-service
Description: A logic issue was addressed with improved checks.
CVE-2023-38593: Noah Roskin-Frazee
OpenLDAP
Available for: macOS Big Sur
Impact: A remote user may be able to cause a denial-of-service
Description: The issue was addressed with improved memory handling.
CVE-2023-2953: Sandipan Roy
PackageKit
Available for: macOS Big Sur
Impact: An app may be able to access user-sensitive data
Description: A logic issue was addressed with improved restrictions.
CVE-2023-38259: Mickey Jin (@patch1t)
PackageKit
Available for: macOS Big Sur
Impact: An app may be able to modify protected parts of the file system
Description: A permissions issue was addressed with additional
restrictions.
CVE-2023-38602: Arsenii Kostromin (0x3c3e)
sips
Available for: macOS Big Sur
Impact: Processing a file may lead to a denial-of-service or potentially
disclose memory contents
Description: An out-of-bounds read was addressed with improved input
validation.
CVE-2023-32443: David Hoyt of Hoyt LLC
Additional recognition
Mail
We would like to acknowledge Parvez Anwar for their assistance.
macOS Big Sur 11.7.9 may be obtained from the Mac App Store or
Apple’s Software Downloads web site:
https://support.apple.com/downloads/
All information is also posted on the Apple Security Updates
web site: https://support.apple.com/en-us/HT201222.
This message is signed with Apple’s Product Security PGP key,
and details are available at:
https://www.apple.com/support/security/pgp/
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Apple Security Advisory 2023-07-24-8 - watchOS 9.6 addresses bypass, code execution, and use-after-free vulnerabilities.
Apple Security Advisory 2023-07-24-8 - watchOS 9.6 addresses bypass, code execution, and use-after-free vulnerabilities.
Apple Security Advisory 2023-07-24-8 - watchOS 9.6 addresses bypass, code execution, and use-after-free vulnerabilities.
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Ubuntu Security Notice 6237-2 - USN-6237-1 fixed vulnerabilities in curl. The update caused a certificate wildcard handling regression on Ubuntu 22.04 LTS. This update fixes the problem. Hiroki Kurosawa discovered that curl incorrectly handled validating certain certificate wildcards. A remote attacker could possibly use this issue to spoof certain website certificates using IDN hosts. Hiroki Kurosawa discovered that curl incorrectly handled callbacks when certain options are set by applications. This could cause applications using curl to misbehave, resulting in information disclosure, or a denial of service. It was discovered that curl incorrectly handled saving cookies to files. A local attacker could possibly use this issue to create or overwrite files. This issue only affected Ubuntu 22.10, and Ubuntu 23.04.
Ubuntu Security Notice 6237-2 - USN-6237-1 fixed vulnerabilities in curl. The update caused a certificate wildcard handling regression on Ubuntu 22.04 LTS. This update fixes the problem. Hiroki Kurosawa discovered that curl incorrectly handled validating certain certificate wildcards. A remote attacker could possibly use this issue to spoof certain website certificates using IDN hosts. Hiroki Kurosawa discovered that curl incorrectly handled callbacks when certain options are set by applications. This could cause applications using curl to misbehave, resulting in information disclosure, or a denial of service. It was discovered that curl incorrectly handled saving cookies to files. A local attacker could possibly use this issue to create or overwrite files. This issue only affected Ubuntu 22.10, and Ubuntu 23.04.
Ubuntu Security Notice 6237-1 - Hiroki Kurosawa discovered that curl incorrectly handled validating certain certificate wildcards. A remote attacker could possibly use this issue to spoof certain website certificates using IDN hosts. Hiroki Kurosawa discovered that curl incorrectly handled callbacks when certain options are set by applications. This could cause applications using curl to misbehave, resulting in information disclosure, or a denial of service.
Ubuntu Security Notice 6237-1 - Hiroki Kurosawa discovered that curl incorrectly handled validating certain certificate wildcards. A remote attacker could possibly use this issue to spoof certain website certificates using IDN hosts. Hiroki Kurosawa discovered that curl incorrectly handled callbacks when certain options are set by applications. This could cause applications using curl to misbehave, resulting in information disclosure, or a denial of service.
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An improper certificate validation vulnerability exists in curl <v8.1.0 in the way it supports matching of wildcard patterns when listed as "Subject Alternative Name" in TLS server certificates. curl can be built to use its own name matching function for TLS rather than one provided by a TLS library. This private wildcard matching function would match IDN (International Domain Name) hosts incorrectly and could as a result accept patterns that otherwise should mismatch. IDN hostnames are converted to puny code before used for certificate checks. Puny coded names always start with `xn--` and should not be allowed to pattern match, but the wildcard check in curl could still check for `x*`, which would match even though the IDN name most likely contained nothing even resembling an `x`.
A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names, selected at build time. If it is built to use the synchronous resolver, it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this, libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.
An information disclosure vulnerability exists in curl <v8.1.0 when doing HTTP(S) transfers, libcurl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data to send, even when the `CURLOPT_POSTFIELDS` option has been set, if the same handle previously wasused to issue a `PUT` request which used that callback. This flaw may surprise the application and cause it to misbehave and either send off the wrong data or use memory after free or similar in the second transfer. The problem exists in the logic for a reused handle when it is (expected to be) changed from a PUT to a POST.