An update for kernel is now available for openEuler-20.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2023-1266 Final 1.0 1.0 2023-04-28 Initial 2023-04-28 2023-04-28 openEuler SA Tool V1.0 2023-04-28 kernel security update An update for kernel is now available for openEuler-20.03-LTS-SP1. The Linux Kernel, the operating system core itself. Security Fix(es): A use-after-free flaw was found in ndlc_remove in drivers/nfc/st-nci/ndlc.c in the Linux Kernel. This flaw could allow an attacker to crash the system due to a race problem.(CVE-2023-1990) The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in drivers/power/supply/da9150-charger.c if a physically proximate attacker unplugs a device.(CVE-2023-30772) The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The same behavior can be observed on a bare-metal machine when forcing the mitigation to IBRS on boot command line.This happened because when plain IBRS was enabled (not enhanced IBRS), the kernel had some logic that determined that STIBP was not needed. The IBRS bit implicitly protects against cross-thread branch target injection. However, with legacy IBRS, the IBRS bit was cleared on returning to userspace, due to performance reasons, which disabled the implicit STIBP and left userspace threads vulnerable to cross-thread branch target injection against which STIBP protects.(CVE-2023-1998) An update for kernel is now available for openEuler-20.03-LTS-SP1. openEuler Security has rated this update as having a security impact of medium. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Medium kernel https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1266 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-1990 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-30772 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-1998 https://nvd.nist.gov/vuln/detail/CVE-2023-1990 https://nvd.nist.gov/vuln/detail/CVE-2023-30772 https://nvd.nist.gov/vuln/detail/CVE-2023-1998 openEuler-20.03-LTS-SP1 bpftool-debuginfo-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-debuginfo-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-source-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-tools-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-tools-debuginfo-4.19.90-2304.5.0.0199.oe1.aarch64.rpm perf-debuginfo-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-devel-4.19.90-2304.5.0.0199.oe1.aarch64.rpm python2-perf-debuginfo-4.19.90-2304.5.0.0199.oe1.aarch64.rpm python3-perf-4.19.90-2304.5.0.0199.oe1.aarch64.rpm python2-perf-4.19.90-2304.5.0.0199.oe1.aarch64.rpm bpftool-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-debugsource-4.19.90-2304.5.0.0199.oe1.aarch64.rpm perf-4.19.90-2304.5.0.0199.oe1.aarch64.rpm python3-perf-debuginfo-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-tools-devel-4.19.90-2304.5.0.0199.oe1.aarch64.rpm kernel-4.19.90-2304.5.0.0199.oe1.src.rpm kernel-debugsource-4.19.90-2304.5.0.0199.oe1.x86_64.rpm bpftool-4.19.90-2304.5.0.0199.oe1.x86_64.rpm kernel-source-4.19.90-2304.5.0.0199.oe1.x86_64.rpm python2-perf-debuginfo-4.19.90-2304.5.0.0199.oe1.x86_64.rpm kernel-tools-4.19.90-2304.5.0.0199.oe1.x86_64.rpm python3-perf-4.19.90-2304.5.0.0199.oe1.x86_64.rpm kernel-4.19.90-2304.5.0.0199.oe1.x86_64.rpm perf-4.19.90-2304.5.0.0199.oe1.x86_64.rpm python2-perf-4.19.90-2304.5.0.0199.oe1.x86_64.rpm perf-debuginfo-4.19.90-2304.5.0.0199.oe1.x86_64.rpm kernel-devel-4.19.90-2304.5.0.0199.oe1.x86_64.rpm bpftool-debuginfo-4.19.90-2304.5.0.0199.oe1.x86_64.rpm kernel-tools-devel-4.19.90-2304.5.0.0199.oe1.x86_64.rpm python3-perf-debuginfo-4.19.90-2304.5.0.0199.oe1.x86_64.rpm kernel-debuginfo-4.19.90-2304.5.0.0199.oe1.x86_64.rpm kernel-tools-debuginfo-4.19.90-2304.5.0.0199.oe1.x86_64.rpm A use-after-free flaw was found in ndlc_remove in drivers/nfc/st-nci/ndlc.c in the Linux Kernel. This flaw could allow an attacker to crash the system due to a race problem. 2023-04-28 CVE-2023-1990 openEuler-20.03-LTS-SP1 Medium 4.7 AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H kernel security update 2023-04-28 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1266 The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in drivers/power/supply/da9150-charger.c if a physically proximate attacker unplugs a device. 2023-04-28 CVE-2023-30772 openEuler-20.03-LTS-SP1 Medium 6.4 AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H kernel security update 2023-04-28 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1266 The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The same behavior can be observed on a bare-metal machine when forcing the mitigation to IBRS on boot command line.This happened because when plain IBRS was enabled (not enhanced IBRS), the kernel had some logic that determined that STIBP was not needed. The IBRS bit implicitly protects against cross-thread branch target injection. However, with legacy IBRS, the IBRS bit was cleared on returning to userspace, due to performance reasons, which disabled the implicit STIBP and left userspace threads vulnerable to cross-thread branch target injection against which STIBP protects. 2023-04-28 CVE-2023-1998 openEuler-20.03-LTS-SP1 Medium 5.6 AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N kernel security update 2023-04-28 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1266