Test ID:	1.3.6.1.4.1.25623.1.0.844877
Category:	Ubuntu Local Security Checks
Title:	Ubuntu: Security Advisory (USN-4887-1)
Summary:	The remote host is missing an update for the 'linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.3, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oem-5.10, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi2-5.3, linux-raspi-5.4' package(s) announced via the USN-4887-1 advisory.
Description:	Summary: The remote host is missing an update for the 'linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.3, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oem-5.10, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi2-5.3, linux-raspi-5.4' package(s) announced via the USN-4887-1 advisory. Vulnerability Insight: De4dCr0w of 360 Alpha Lab discovered that the BPF verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker could use this to expose sensitive information (kernel memory) or possibly execute arbitrary code. (CVE-2021-3444) Adam Nichols discovered that heap overflows existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-27365) Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly compute a speculative execution limit on pointer arithmetic in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27171) Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly apply speculative execution limits on some pointer types. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27170) Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did not properly restrict access to iSCSI transport handles. A local attacker could use this to cause a denial of service or expose sensitive information (kernel pointer addresses). (CVE-2021-27363) Adam Nichols discovered that an out-of-bounds read existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information (kernel memory). (CVE-2021-27364) Affected Software/OS: 'linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke-5.3, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe, linux-hwe-5.4, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oem-5.10, linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi2-5.3, linux-raspi-5.4' package(s) on Ubuntu 18.04, Ubuntu 20.04, Ubuntu 20.10. Solution: Please install the updated package(s). CVSS Score: 4.6 CVSS Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2020-27170 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FB6LUXPEIRLZH32YXWZVEZAD4ZL6SDK2/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRTPQE73ANG7D6M4L4PK5ZQDPO4Y2FVD/ http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f232326f6966cf2a1d1db7bc917a4ce5f9f55f76 https://www.openwall.com/lists/oss-security/2021/03/19/2 https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html http://www.openwall.com/lists/oss-security/2021/03/24/4 Common Vulnerability Exposure (CVE) ID: CVE-2020-27171 https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/patch/?id=10d2bb2e6b1d8c4576c56a748f697dbeb8388899 https://www.openwall.com/lists/oss-security/2021/03/19/3 http://www.openwall.com/lists/oss-security/2021/03/24/5 Common Vulnerability Exposure (CVE) ID: CVE-2021-27363 http://www.openwall.com/lists/oss-security/2021/03/06/1 https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html https://bugzilla.suse.com/show_bug.cgi?id=1182716 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aa https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html Common Vulnerability Exposure (CVE) ID: CVE-2021-27364 https://security.netapp.com/advisory/ntap-20210409-0001/ https://bugzilla.suse.com/show_bug.cgi?id=1182717 https://www.openwall.com/lists/oss-security/2021/03/06/1 https://www.oracle.com/security-alerts/cpuoct2021.html Common Vulnerability Exposure (CVE) ID: CVE-2021-27365 https://bugzilla.suse.com/show_bug.cgi?id=1182715 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ec98ea7070e94cc25a422ec97d1421e28d97b7ee https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9dbdf97a5bd92b1a49cee3d591b55b11fd7a6d5 Common Vulnerability Exposure (CVE) ID: CVE-2021-3444 http://packetstormsecurity.com/files/164950/Kernel-Live-Patch-Security-Notice-LSN-0082-1.html https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b00f1b78809 https://www.openwall.com/lists/oss-security/2021/03/23/2 https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html http://www.openwall.com/lists/oss-security/2021/03/23/2
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