[RHSA-2020:4062-01] Important: kernel-rt security and bug fix update

Tue Sep 29 18:59:24 UTC 2020

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux for Real Time (v. 7) - noarch, x86_64
Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

3. Description:

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: use-after-free in sound/core/timer.c (CVE-2019-19807)

* kernel: out of bounds write in function i2c_smbus_xfer_emulated in
drivers/i2c/i2c-core-smbus.c (CVE-2017-18551)

* kernel: race condition in smp_task_timedout() and smp_task_done() in
drivers/scsi/libsas/sas_expander.c leads to use-after-free (CVE-2018-20836)

* kernel: out of bounds write in i2c driver leads to local escalation of
privilege (CVE-2019-9454)

* kernel: use after free due to race condition in the video driver leads to
local privilege escalation (CVE-2019-9458)

Space precludes documenting all of the security fixes in this advisory. See
the descriptions of the remaining security fixes in the related Knowledge
Article:

https://access.redhat.com/articles/5442481

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.9 Release Notes linked from the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1427551 - mm/swap: Convert to percpu locked
1707796 - CVE-2018-20836 kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free
1745528 - CVE-2019-15217 kernel: null pointer dereference in drivers/media/usb/zr364xx/zr364xx.c driver
1747216 - CVE-2019-15807 kernel: Memory leak in drivers/scsi/libsas/sas_expander.c
1757368 - CVE-2017-18551 kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c
1758242 - CVE-2019-17053 kernel: unprivileged users able to create RAW sockets in AF_IEEE802154 network protocol
1758248 - CVE-2019-17055 kernel: unprivileged users able to create RAW sockets in AF_ISDN network protocol
1759681 - CVE-2019-16994 kernel: Memory leak in sit_init_net() in net/ipv6/sit.c
1760100 - CVE-2019-15917 kernel: use-after-free in drivers/bluetooth/hci_ldisc.c
1760310 - CVE-2019-16231 kernel: null-pointer dereference in drivers/net/fjes/fjes_main.c
1760420 - CVE-2019-16233 kernel: null pointer dereference in drivers/scsi/qla2xxx/qla_os.c
1774988 - CVE-2019-19046 kernel: Denial Of Service in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c
1775015 - CVE-2019-19063 kernel: Two memory leaks in the rtl_usb_probe() function in drivers/net/wireless/realtek/rtlwifi/usb.c allow for a DoS
1775021 - CVE-2019-19062 kernel: memory leak in the crypto_report() function in crypto/crypto_user_base.c allows for DoS
1775042 - CVE-2019-19059 kernel: Multiple memory leaks in the iwl_pcie_ctxt_info_gen3_init() function in drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c allows for a DoS
1775047 - CVE-2019-19058 kernel: A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c allows for a DoS
1775074 - CVE-2019-19055 kernel: memory leak in the nl80211_get_ftm_responder_stats() function in net/wireless/nl80211.c allows DoS
1777418 - CVE-2019-18808 kernel: memory leak in ccp_run_sha_cmd() function in drivers/crypto/ccp/ccp-ops.c
1779594 - CVE-2019-19332 Kernel: kvm: OOB memory write via kvm_dev_ioctl_get_cpuid
1781679 - CVE-2019-19447 kernel: mounting a crafted ext4 filesystem image, performing some operations, and unmounting can lead to a use-after-free in ext4_put_super in fs/ext4/super.c
1783434 - CVE-2019-19523 kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver
1783459 - CVE-2019-19524 kernel: a malicious USB device in the drivers/input/ff-memless.c leads to use-after-free
1783518 - CVE-2019-19530 kernel: use-after-free caused by a malicious USB device in the drivers/usb/class/cdc-acm.c driver
1783540 - CVE-2019-19534 kernel: information leak bug caused by a malicious USB device in the drivers/net/can/usb/peak_usb/pcan_usb_core.c driver
1783561 - CVE-2019-19537 kernel: race condition caused by a malicious USB device in the USB character device driver layer
1786078 - CVE-2019-19807 kernel: use-after-free in sound/core/timer.c
1786160 - CVE-2019-19767 kernel: use-after-free in __ext4_expand_extra_isize and ext4_xattr_set_entry related to fs/ext4/inode.c and fs/ext4/super.c
1788009 - Request nx_huge_pages=N as default value to avoid kvm-rt guest large latency spike
1790063 - CVE-2019-20054 kernel: Null pointer dereference in drop_sysctl_table() in fs/proc/proc_sysctl.c
1791954 - CVE-2019-20095 kernel: memory leak in mwifiex_tm_cmd in drivers/net/wireless/marvell/mwifiex/cfg80211.c
1802555 - CVE-2020-8649 kernel: invalid read location in vgacon_invert_region function in drivers/video/console/vgacon.c
1802563 - CVE-2020-8647 kernel: out-of-bounds read in in vc_do_resize function in drivers/tty/vt/vt.c
1805135 - CVE-2020-2732 Kernel: kvm: nVMX: L2 guest may trick the L0 hypervisor to access sensitive L1 resources
1809833 - CVE-2020-1749 kernel: some ipv6 protocols not encrypted over ipsec tunnel
1810685 - CVE-2020-9383 kernel: out-of-bounds read in set_fdc in drivers/block/floppy.c
1817141 - CVE-2020-10690 kernel: use-after-free in cdev_put() when a PTP device is removed while it's chardev is open
1817718 - CVE-2020-10942 kernel: vhost-net: stack overflow in get_raw_socket while checking sk_family field
1818818 - CVE-2019-9454 kernel: out of bounds write in i2c driver leads to local escalation of privilege
1819377 - CVE-2019-9458 kernel: use after free due to race condition in the video driver leads to local privilege escalation
1822077 - CVE-2020-12826 kernel: possible to send arbitrary signals to a privileged (suidroot) parent process
1824059 - CVE-2019-20636 kernel: out-of-bounds write via crafted keycode table
1824918 - CVE-2020-11565 kernel: out-of-bounds write in mpol_parse_str function in mm/mempolicy.c
1831399 - CVE-2020-10732 kernel: uninitialized kernel data leak in userspace coredumps
1834845 - CVE-2020-12770 kernel: sg_write function lacks an sg_remove_request call in a certain failure case
1835127 - CVE-2020-10742 kernel: NFS client crash due to index buffer overflow during Direct IO write causing kernel panic
1839634 - CVE-2020-10751 kernel: SELinux netlink permission check bypass
1850716 - CVE-2020-14305 kernel: memory corruption in Voice over IP nf_conntrack_h323 module

6. Package List:

Red Hat Enterprise Linux for Real Time for NFV (v. 7):

Source:
kernel-rt-3.10.0-1160.rt56.1131.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1160.rt56.1131.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debug-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-trace-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm

Red Hat Enterprise Linux for Real Time (v. 7):

Source:
kernel-rt-3.10.0-1160.rt56.1131.el7.src.rpm

noarch:
kernel-rt-doc-3.10.0-1160.rt56.1131.el7.noarch.rpm

x86_64:
kernel-rt-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debug-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debug-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debug-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-trace-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-trace-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
kernel-rt-trace-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2017-18551
https://access.redhat.com/security/cve/CVE-2018-20836
https://access.redhat.com/security/cve/CVE-2019-9454
https://access.redhat.com/security/cve/CVE-2019-9458
https://access.redhat.com/security/cve/CVE-2019-15217
https://access.redhat.com/security/cve/CVE-2019-15807
https://access.redhat.com/security/cve/CVE-2019-15917
https://access.redhat.com/security/cve/CVE-2019-16231
https://access.redhat.com/security/cve/CVE-2019-16233
https://access.redhat.com/security/cve/CVE-2019-16994
https://access.redhat.com/security/cve/CVE-2019-17053
https://access.redhat.com/security/cve/CVE-2019-17055
https://access.redhat.com/security/cve/CVE-2019-18808
https://access.redhat.com/security/cve/CVE-2019-19046
https://access.redhat.com/security/cve/CVE-2019-19055
https://access.redhat.com/security/cve/CVE-2019-19058
https://access.redhat.com/security/cve/CVE-2019-19059
https://access.redhat.com/security/cve/CVE-2019-19062
https://access.redhat.com/security/cve/CVE-2019-19063
https://access.redhat.com/security/cve/CVE-2019-19332
https://access.redhat.com/security/cve/CVE-2019-19447
https://access.redhat.com/security/cve/CVE-2019-19523
https://access.redhat.com/security/cve/CVE-2019-19524
https://access.redhat.com/security/cve/CVE-2019-19530
https://access.redhat.com/security/cve/CVE-2019-19534
https://access.redhat.com/security/cve/CVE-2019-19537
https://access.redhat.com/security/cve/CVE-2019-19767
https://access.redhat.com/security/cve/CVE-2019-19807
https://access.redhat.com/security/cve/CVE-2019-20054
https://access.redhat.com/security/cve/CVE-2019-20095
https://access.redhat.com/security/cve/CVE-2019-20636
https://access.redhat.com/security/cve/CVE-2020-1749
https://access.redhat.com/security/cve/CVE-2020-2732
https://access.redhat.com/security/cve/CVE-2020-8647
https://access.redhat.com/security/cve/CVE-2020-8649
https://access.redhat.com/security/cve/CVE-2020-9383
https://access.redhat.com/security/cve/CVE-2020-10690
https://access.redhat.com/security/cve/CVE-2020-10732
https://access.redhat.com/security/cve/CVE-2020-10742
https://access.redhat.com/security/cve/CVE-2020-10751
https://access.redhat.com/security/cve/CVE-2020-10942
https://access.redhat.com/security/cve/CVE-2020-11565
https://access.redhat.com/security/cve/CVE-2020-12770
https://access.redhat.com/security/cve/CVE-2020-12826
https://access.redhat.com/security/cve/CVE-2020-14305
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index
https://access.redhat.com/articles/5442481

8. Contact:

The Red Hat security contact is <secalert at redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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