An update for kernel is now available for openEuler-22.03-LTS Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2023-1585 Final 1.0 1.0 2023-09-02 Initial 2023-09-02 2023-09-02 openEuler SA Tool V1.0 2023-09-02 kernel security update An update for kernel is now available for openEuler-22.03-LTS. The Linux Kernel, the operating system core itself. Security Fix(es): A hash collision flaw was found in the IPv6 connection lookup table in the Linux kernel’s IPv6 functionality when a user makes a new kind of SYN flood attack. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95%.(CVE-2023-1206) A buffer overrun vulnerability was found in the netback driver in Xen due to an unusual split packet. This flaw allows an unprivileged guest to cause a denial of service (DoS) of the host by sending network packets to the backend, causing the backend to crash.(CVE-2023-34319) An issue was discovered in the Linux kernel before 6.3.10. fs/smb/server/smb2misc.c in ksmbd does not validate the relationship between the command payload size and the RFC1002 length specification, leading to an out-of-bounds read.(CVE-2023-38432) (CVE-2023-3867) An issue was discovered in l2cap_sock_release in net/bluetooth/l2cap_sock.c in the Linux kernel before 6.4.10. There is a use-after-free because the children of an sk are mishandled.(CVE-2023-40283) A flaw was found in the Linux kernel's TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ("tun: tun_chr_open(): correctly initialize socket uid"), - 66b2c338adce ("tap: tap_open(): correctly initialize socket uid"), pass "inode->i_uid" to sock_init_data_uid() as the last parameter and that turns out to not be accurate.(CVE-2023-4194) A flaw was found in btrfs_get_root_ref in fs/btrfs/disk-io.c in the btrfs filesystem in the Linux Kernel due to a double decrement of the reference count. This issue may allow a local attacker with user privilege to crash the system or may lead to leaked internal kernel information.(CVE-2023-4389) An update for kernel is now available for openEuler-22.03-LTS. openEuler Security has rated this update as having a security impact of critical. 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. Critical kernel https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1585 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-1206 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-34319 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-38432 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-3867 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-40283 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-4194 https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2023-4389 https://nvd.nist.gov/vuln/detail/CVE-2023-1206 https://nvd.nist.gov/vuln/detail/CVE-2023-34319 https://nvd.nist.gov/vuln/detail/CVE-2023-38432 https://nvd.nist.gov/vuln/detail/CVE-2023-3867 https://nvd.nist.gov/vuln/detail/CVE-2023-40283 https://nvd.nist.gov/vuln/detail/CVE-2023-4194 https://nvd.nist.gov/vuln/detail/CVE-2023-4389 openEuler-22.03-LTS kernel-debugsource-5.10.0-60.109.0.136.oe2203.aarch64.rpm python3-perf-debuginfo-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-5.10.0-60.109.0.136.oe2203.aarch64.rpm python3-perf-5.10.0-60.109.0.136.oe2203.aarch64.rpm perf-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-tools-devel-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-source-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-tools-debuginfo-5.10.0-60.109.0.136.oe2203.aarch64.rpm bpftool-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-tools-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-debuginfo-5.10.0-60.109.0.136.oe2203.aarch64.rpm bpftool-debuginfo-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-devel-5.10.0-60.109.0.136.oe2203.aarch64.rpm perf-debuginfo-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-headers-5.10.0-60.109.0.136.oe2203.aarch64.rpm kernel-5.10.0-60.109.0.136.oe2203.src.rpm kernel-5.10.0-60.109.0.136.oe2203.x86_64.rpm bpftool-debuginfo-5.10.0-60.109.0.136.oe2203.x86_64.rpm kernel-tools-devel-5.10.0-60.109.0.136.oe2203.x86_64.rpm kernel-debuginfo-5.10.0-60.109.0.136.oe2203.x86_64.rpm kernel-devel-5.10.0-60.109.0.136.oe2203.x86_64.rpm kernel-debugsource-5.10.0-60.109.0.136.oe2203.x86_64.rpm kernel-headers-5.10.0-60.109.0.136.oe2203.x86_64.rpm kernel-tools-5.10.0-60.109.0.136.oe2203.x86_64.rpm perf-debuginfo-5.10.0-60.109.0.136.oe2203.x86_64.rpm python3-perf-5.10.0-60.109.0.136.oe2203.x86_64.rpm python3-perf-debuginfo-5.10.0-60.109.0.136.oe2203.x86_64.rpm kernel-tools-debuginfo-5.10.0-60.109.0.136.oe2203.x86_64.rpm kernel-source-5.10.0-60.109.0.136.oe2203.x86_64.rpm perf-5.10.0-60.109.0.136.oe2203.x86_64.rpm bpftool-5.10.0-60.109.0.136.oe2203.x86_64.rpm A hash collision flaw was found in the IPv6 connection lookup table in the Linux kernel’s IPv6 functionality when a user makes a new kind of SYN flood attack. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95%. 2023-09-02 CVE-2023-1206 openEuler-22.03-LTS Medium 5.7 AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H kernel security update 2023-09-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1585 A buffer overrun vulnerability was found in the netback driver in Xen due to an unusual split packet. This flaw allows an unprivileged guest to cause a denial of service (DoS) of the host by sending network packets to the backend, causing the backend to crash. 2023-09-02 CVE-2023-34319 openEuler-22.03-LTS Medium 5.5 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H kernel security update 2023-09-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1585 An issue was discovered in the Linux kernel before 6.3.10. fs/smb/server/smb2misc.c in ksmbd does not validate the relationship between the command payload size and the RFC1002 length specification, leading to an out-of-bounds read. 2023-09-02 CVE-2023-38432 openEuler-22.03-LTS Critical 9.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H kernel security update 2023-09-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1585 2023-09-02 CVE-2023-3867 openEuler-22.03-LTS High 7.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L kernel security update 2023-09-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1585 An issue was discovered in l2cap_sock_release in net/bluetooth/l2cap_sock.c in the Linux kernel before 6.4.10. There is a use-after-free because the children of an sk are mishandled. 2023-09-02 CVE-2023-40283 openEuler-22.03-LTS High 7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H kernel security update 2023-09-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1585 A flaw was found in the Linux kernel s TUN/TAP functionality. This issue could allow a local user to bypass network filters and gain unauthorized access to some resources. The original patches fixing CVE-2023-1076 are incorrect or incomplete. The problem is that the following upstream commits - a096ccca6e50 ( tun: tun_chr_open(): correctly initialize socket uid ), - 66b2c338adce ( tap: tap_open(): correctly initialize socket uid ), pass inode->i_uid to sock_init_data_uid() as the last parameter and that turns out to not be accurate. 2023-09-02 CVE-2023-4194 openEuler-22.03-LTS Medium 5.5 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N kernel security update 2023-09-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1585 A flaw was found in btrfs_get_root_ref in fs/btrfs/disk-io.c in the btrfs filesystem in the Linux Kernel due to a double decrement of the reference count. This issue may allow a local attacker with user privilege to crash the system or may lead to leaked internal kernel information. 2023-09-02 CVE-2023-4389 openEuler-22.03-LTS High 7.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H kernel security update 2023-09-02 https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1585