Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2021:3360-1 Final 1 1 2021-10-12T12:02:15Z current 2021-10-12T12:02:15Z 2021-10-12T12:02:15Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3) This update for the Linux Kernel 5.3.18-57 fixes several issues. The following security issues were fixed: - CVE-2021-31440: Fixed a lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. (bsc#1190127). - CVE-2021-38160: Fixed a bug that could lead to a data corruption or loss. This can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size in drivers/char/virtio_console.c (bsc#1190118) - CVE-2021-3640: Fixed a user-after-free bug in the function sco_sock_sendmsg which could lead to local privilege escalation. (bsc#1188613) - CVE-2021-3573: Fixed a user-after-free bug in the function hci_sock_bound_ioctl which could lead to local privilege escalation. (bsc#1187054). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2021-3360,SUSE-SLE-Module-Live-Patching-15-SP3-2021-3360 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2021/suse-su-20213360-1/ Link for SUSE-SU-2021:3360-1 https://lists.suse.com/pipermail/sle-security-updates/2021-October/009578.html E-Mail link for SUSE-SU-2021:3360-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1187054 SUSE Bug 1187054 https://bugzilla.suse.com/1188613 SUSE Bug 1188613 https://bugzilla.suse.com/1190118 SUSE Bug 1190118 https://bugzilla.suse.com/1190127 SUSE Bug 1190127 https://www.suse.com/security/cve/CVE-2021-31440/ SUSE CVE CVE-2021-31440 page https://www.suse.com/security/cve/CVE-2021-3573/ SUSE CVE CVE-2021-3573 page https://www.suse.com/security/cve/CVE-2021-3640/ SUSE CVE CVE-2021-3640 page https://www.suse.com/security/cve/CVE-2021-38160/ SUSE CVE CVE-2021-38160 page SUSE Linux Enterprise Live Patching 15 SP3 kernel-livepatch-5_3_18-57-default-7-3.1 kernel-livepatch-5_3_18-57-preempt-7-3.1 kernel-livepatch-5_3_18-57-default-7-3.1 as a component of SUSE Linux Enterprise Live Patching 15 SP3 This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel 5.11.15. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel. Was ZDI-CAN-13661. CVE-2021-31440 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2021/suse-su-20213360-1/ https://www.suse.com/security/cve/CVE-2021-31440.html CVE-2021-31440 https://bugzilla.suse.com/1190126 SUSE Bug 1190126 https://bugzilla.suse.com/1190127 SUSE Bug 1190127 A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5. CVE-2021-3573 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2021/suse-su-20213360-1/ https://www.suse.com/security/cve/CVE-2021-3573.html CVE-2021-3573 https://bugzilla.suse.com/1186666 SUSE Bug 1186666 https://bugzilla.suse.com/1187054 SUSE Bug 1187054 https://bugzilla.suse.com/1188172 SUSE Bug 1188172 A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system. CVE-2021-3640 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2021/suse-su-20213360-1/ https://www.suse.com/security/cve/CVE-2021-3640.html CVE-2021-3640 https://bugzilla.suse.com/1188172 SUSE Bug 1188172 https://bugzilla.suse.com/1188613 SUSE Bug 1188613 https://bugzilla.suse.com/1191530 SUSE Bug 1191530 https://bugzilla.suse.com/1196810 SUSE Bug 1196810 https://bugzilla.suse.com/1196914 SUSE Bug 1196914 ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE: the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the length validation was added solely for robustness in the face of anomalous host OS behavior. CVE-2021-38160 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-57-default-7-3.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2021/suse-su-20213360-1/ https://www.suse.com/security/cve/CVE-2021-38160.html CVE-2021-38160 https://bugzilla.suse.com/1190117 SUSE Bug 1190117 https://bugzilla.suse.com/1190118 SUSE Bug 1190118 https://bugzilla.suse.com/1196914 SUSE Bug 1196914