The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bug fixes.

The following security bugs were fixed :

CVE-2020-25705: A flaw in the way reply ICMP packets are limited in was found that allowed to quickly scan open UDP ports. This flaw allowed an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software and services that rely on UDP source port randomization (like DNS) are indirectly affected as well. Kernel versions may be vulnerable to this issue (bsc#1175721, bsc#1178782).

CVE-2020-25704: Fixed a memory leak in perf_event_parse_addr_filter() (bsc#1178393).

CVE-2020-25668: Fixed a use-after-free in con_font_op() (bnc#1178123).

CVE-2020-25656: Fixed a concurrency use-after-free in vt_do_kdgkb_ioctl (bnc#1177766).

CVE-2020-25285: Fixed a race condition between hugetlb sysctl handlers in mm/hugetlb.c (bnc#1176485).

CVE-2020-0430: Fixed an OOB read in skb_headlen of /include/linux/skbuff.h (bnc#1176723).

CVE-2020-14351: Fixed a race in the perf_mmap_close() function (bsc#1177086).

CVE-2020-16120: Fixed a permissions issue in ovl_path_open() (bsc#1177470).

CVE-2020-8694: Restricted energy meter to root access (bsc#1170415).

CVE-2020-12351: Implemented a kABI workaround for bluetooth l2cap_ops filter addition (bsc#1177724).

CVE-2020-12352: Fixed an information leak when processing certain AMP packets aka 'BleedingTooth' (bsc#1177725).

CVE-2020-25212: Fixed a TOCTOU mismatch in the NFS client code (bnc#1176381).

CVE-2020-25645: Fixed an an issue in IPsec that caused traffic between two Geneve endpoints to be unencrypted (bnc#1177511).

CVE-2020-14381: Fixed a UAF in the fast user mutex (futex) wait operation (bsc#1176011).

CVE-2020-25643: Fixed an improper input validation in the ppp_cp_parse_cr function of the HDLC_PPP module (bnc#1177206).

CVE-2020-25641: Fixed a zero-length biovec request issued by the block subsystem could have caused the kernel to enter an infinite loop, causing a denial of service (bsc#1177121).

CVE-2020-26088: Fixed an improper CAP_NET_RAW check in NFC socket creation could have been used by local attackers to create raw sockets, bypassing security mechanisms (bsc#1176990).

CVE-2020-14390: Fixed an out-of-bounds memory write leading to memory corruption or a denial of service when changing screen size (bnc#1176235).

CVE-2020-0432: Fixed an out of bounds write due to an integer overflow (bsc#1176721).

CVE-2020-0427: Fixed an out of bounds read due to a use after free (bsc#1176725).

CVE-2020-0431: Fixed an out of bounds write due to a missing bounds check (bsc#1176722).

CVE-2020-0404: Fixed a linked list corruption due to an unusual root cause (bsc#1176423).

CVE-2020-25284: Fixed an incomplete permission checking for access to rbd devices, which could have been leveraged by local attackers to map or unmap rbd block devices (bsc#1176482).

CVE-2020-27673: Fixed an issue where rogue guests could have caused denial of service of Dom0 via high frequency events (XSA-332 bsc#1177411)

CVE-2020-27675: Fixed a race condition in event handler which may crash dom0 (XSA-331 bsc#1177410).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0857 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c     (CVE-2020-25211)

    * kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)

    * kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)

    * kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)

    * kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)

    * kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)

    * kernel: performance counters race condition use-after-free (CVE-2020-14351)

    * kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)

    * kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)

    * kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)

    * kernel: increase slab leak leads to DoS (CVE-2021-20265)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * kernel-rt: update to the latest RHEL7.9.z4 source tree (BZ#1917909)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0856 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c     (CVE-2020-25211)

    * kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)

    * kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)

    * kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)

    * kernel: out-of-bounds reads in pinctrl subsystem. (CVE-2020-0427)

    * kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c (CVE-2020-7053)

    * kernel: performance counters race condition use-after-free (CVE-2020-14351)

    * kernel: Geneve/IPsec traffic may be unencrypted between two Geneve endpoints (CVE-2020-25645)

    * kernel: use-after-free in read in vt_do_kdgkb_ioctl (CVE-2020-25656)

    * kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)

    * kernel: increase slab leak leads to DoS (CVE-2021-20265)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * BUG: scheduling while atomic: memory allocation under spinlock in scsi_register_device_handler()     (BZ#1619147)

    * WARNING in __iscsit_free_cmd during recovery Abort (BZ#1784540)

    * lpfc does not issue adisc to fcp-2 devices, does not respond to nvme targer that send an adisc.
    (BZ#1875961)

    * Panic in semctl_nolock.constprop.15+0x25b (BZ#1877264)

    * [RHEL 7.7][md]Crash due to invalid pool workqueue pointer, work queue race (BZ#1889372)

    * Guest crash on intel CPU with -cpu host,-spec-ctrl,+ibpb (BZ#1890669)

    * RHEL7.9 - kernel/uv: handle length extension properly (BZ#1899172)

    * Commit b144f013fc16a06d7a4b9a4be668a3583fafeda2 'i40e: don't report link up for a VF who hasn't enabled     queues' introducing issues with VM using DPDK (BZ#1901064)

    * writing to /sys/devices/(...)/net/eno49/queues/tx-16/xps_cpus triggers kernel panic (BZ#1903819)

    * [Hyper-V][RHEL-7.9]video: hyperv_fb: Fix the cache type when mapping the VRAM Edit (BZ#1908896)

    * kvm-rhel7.9 [AMD] - system crash observed while powering on virtual machine with attached VF interfaces.
    (BZ#1909036)

    * kernel: nvme nvme7: Connect command failed, error wo/DNR bit: 2 (BZ#1910817)

    * dm-mirror crashes from assuming underlying storage will have a non-NULL merge_bvec_fn (BZ#1916407)

    * watchdog: use nmi registers snapshot in hardlockup handler (BZ#1916589)

    * [DELL EMC 7.9 BUG] - Intel E810 NIC interfaces are not functional in RHEL 7.9 on system with AMD Rome     CPUs (BZ#1918273)

    * [DELL EMC BUG] RHEL system log shows AMD-Vi error when system connected with Gen 4 NVMe drives.
    (BZ#1921187)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4680-1 advisory.

    It was discovered that debugfs in the Linux kernel as used by blktrace contained a use-after-free in some     situations. A privileged local attacker could possibly use this to cause a denial of service (system     crash). (CVE-2019-19770)

    It was discovered that a race condition existed in the binder IPC implementation in the Linux kernel,     leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2020-0423)

    Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-     connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to     complete authentication without pairing credentials via adjacent access. A physically proximate attacker     could use this to impersonate a previously paired Bluetooth device. (CVE-2020-10135)

    It was discovered that the console keyboard driver in the Linux kernel contained a race condition. A local     attacker could use this to expose sensitive information (kernel memory). (CVE-2020-25656)

    Minh Yuan discovered that the tty driver in the Linux kernel contained race conditions when handling     fonts. A local attacker could possibly use this to expose sensitive information (kernel memory).
    (CVE-2020-25668)

    Keyu Man discovered that the ICMP global rate limiter in the Linux kernel could be used to assist in     scanning open UDP ports. A remote attacker could use to facilitate attacks on UDP based services that     depend on source port randomization. (CVE-2020-25705)

    Jinoh Kang discovered that the Xen event channel infrastructure in the Linux kernel contained a race     condition. An attacker in guest could possibly use this to cause a denial of service (dom0 crash).
    (CVE-2020-27675)

    Daniel Axtens discovered that PowerPC RTAS implementation in the Linux kernel did not properly restrict     memory accesses in some situations. A privileged local attacker could use this to arbitrarily modify     kernel memory, potentially bypassing kernel lockdown restrictions. (CVE-2020-27777)

    Minh Yuan discovered that the framebuffer console driver in the Linux kernel did not properly handle fonts     in some conditions. A local attacker could use this to cause a denial of service (system crash) or     possibly expose sensitive information (kernel memory). (CVE-2020-28974)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The 5.9.8 stable kernel rebase contains a number of enhancements including new hardware support, additional features, and a number of important fixes across the tree.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2020-1462 advisory.

  - ** DISPUTED ** In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove     function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously     created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel     developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of     debugfs within blktrace. (CVE-2019-19770)

  - A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem     allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate     privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as     system availability. (CVE-2020-14351)

  - A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was     using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of     bounds. The highest threat from this vulnerability is to data confidentiality. (CVE-2020-25656)

  - A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using     PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of     service. (CVE-2020-25704)

  - An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users     can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.
    (CVE-2020-27673)

  - An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x.
    drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race     condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash     via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5. (CVE-2020-27675)

  - A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked     down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries     platform) a root like local user could use this flaw to further increase their privileges to that of a     running kernel. (CVE-2020-27777)

  - An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9.
    Local attackers on systems with the speakup driver could cause a local denial of service attack, aka     CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.
    (CVE-2020-28941)

  - A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to     read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because     KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height. (CVE-2020-28974)

  - Insufficient access control in the Linux kernel driver for some Intel(R) Processors may allow an     authenticated user to potentially enable information disclosure via local access. (CVE-2020-8694)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

This plugin has been deprecated due to Amazon pulling the previously published advisory.

The SUSE Linux Enterprise 15 SP1 kernel was updated to receive various security and bug fixes.

The following security bugs were fixed :

CVE-2020-25656: Fixed a concurrency use-after-free in vt_do_kdgkb_ioctl (bnc#1177766).

CVE-2020-25285: Fixed a race condition between hugetlb sysctl handlers in mm/hugetlb.c (bnc#1176485).

CVE-2020-0430: Fixed an OOB read in skb_headlen of /include/linux/skbuff.h (bnc#1176723).

CVE-2020-14351: Fixed a race in the perf_mmap_close() function (bsc#1177086).

CVE-2020-16120: Fixed a permissions issue in ovl_path_open() (bsc#1177470).

CVE-2020-8694: Restricted energy meter to root access (bsc#1170415).

CVE-2020-27673: Fixed an issue where rogue guests could have caused denial of service of Dom0 via high frequency events (XSA-332 bsc#1177411)

CVE-2020-27675: Fixed a race condition in event handler which may crash dom0 (XSA-331 bsc#1177410).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - kernel: out of bounds read in drivers/media/usb/dvb-usb/technisat-usb2.c (CVE-2019-15505)

  - kernel: buffer-overflow hardening in WiFi beacon validation code. (CVE-2019-16746)

  - block/scsi_ioctl.c in the Linux kernel through 3.8 does not properly consider the SCSI device class during     authorization of SCSI commands, which allows local users to bypass intended access restrictions via an     SG_IO ioctl call that leverages overlapping opcodes. (CVE-2012-4542)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

ID	Name	Product	Family	Published	Updated	Severity
143857	SUSE SLES12 Security Update : kernel (SUSE-SU-2020:3544-1)	Nessus	SuSE Local Security Checks	12/9/2020	12/5/2022	high
147827	RHEL 7 : kernel-rt (RHSA-2021:0857)	Nessus	Red Hat Local Security Checks	3/17/2021	11/7/2024	high
147835	RHEL 7 : kernel (RHSA-2021:0856)	Nessus	Red Hat Local Security Checks	3/17/2021	11/7/2024	high
143398	openSUSE Security Update : the Linux Kernel (openSUSE-2020-2112)	Nessus	SuSE Local Security Checks	12/1/2020	2/7/2024	high
144749	Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4680-1)	Nessus	Ubuntu Local Security Checks	1/6/2021	8/27/2024	high
142934	Fedora 32 : kernel / kernel-headers / kernel-tools (2020-e211716d08)	Nessus	Fedora Local Security Checks	11/17/2020	2/8/2024	medium
144464	Amazon Linux AMI : kernel (ALAS-2020-1462) (deprecated)	Nessus	Amazon Linux Local Security Checks	12/19/2020	12/23/2020	high
143809	SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3272-1)	Nessus	SuSE Local Security Checks	12/9/2020	2/5/2024	high
199280	RHEL 7 : kernel (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	6/3/2024	10/22/2024	critical

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