RHSA-2020:1016 - Security Advisory

Topic

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

Red Hat Product Security has rated this update as having a security impact of Moderate. 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.

Description

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

Security Fix(es):

• kernel: out of bound read in DVB connexant driver. (CVE-2015-9289)
• kernel: Missing permissions check for request_key() destination allows local attackers to add keys to keyring without Write permission (CVE-2017-17807)
• kernel: denial of service via ioctl call in network tun handling (CVE-2018-7191)
• kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS (CVE-2018-20169)
• kernel: perf_event_open() and execve() race in setuid programs allows a data leak (CVE-2019-3901)
• kernel: brcmfmac frame validation bypass (CVE-2019-9503)
• kernel: null-pointer dereference in hci_uart_set_flow_control (CVE-2019-10207)
• kernel: sensitive information disclosure from kernel stack memory via HIDPCONNADD command (CVE-2019-11884)
• kernel: unchecked kstrdup of fwstr in drm_load_edid_firmware leads to denial of service (CVE-2019-12382)
• kernel: use-after-free in arch/x86/lib/insn-eval.c (CVE-2019-13233)
• kernel: denial of service in arch/powerpc/kernel/signal_32.c and arch/powerpc/kernel/signal_64.c via sigreturn() system call (CVE-2019-13648)
• kernel: integer overflow and OOB read in drivers/block/floppy.c (CVE-2019-14283)
• kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service (CVE-2019-15916)
• kernel: buffer-overflow hardening in WiFi beacon validation code. (CVE-2019-16746)
• kernel: (powerpc) incomplete Spectre-RSB mitigation leads to information exposure (CVE-2019-18660)
• kernel: oob memory read in hso_probe in drivers/net/usb/hso.c (CVE-2018-19985)
• Kernel: net: weak IP ID generation leads to remote device tracking (CVE-2019-10638)
• Kernel: net: using kernel space address bits to derive IP ID may potentially break KASLR (CVE-2019-10639)
• kernel: ASLR bypass for setuid binaries due to late install_exec_creds() (CVE-2019-11190)

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 7.8 Release Notes linked from the References section.

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.

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Virtualization Host 4 for RHEL 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 1507149 - [LLNL 7.5 Bug] slab leak causing a crash when using kmem control group
• BZ - 1528335 - CVE-2017-17807 kernel: Missing permissions check for request_key() destination allows local attackers to add keys to keyring without Write permission
• BZ - 1651706 - kernel: sd 0:0:9:0: timing out command, waited XXXs - which command timed out?
• BZ - 1660385 - CVE-2018-20169 kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS
• BZ - 1666106 - CVE-2018-19985 kernel: oob memory read in hso_probe in drivers/net/usb/hso.c
• BZ - 1694201 - cifs repeatedly tries to open a file using smb v1 on an smb2 mount after receiving STATUS_SHARING_VIOLATION
• BZ - 1699856 - CVE-2019-11190 kernel: ASLR bypass for setuid binaries due to late install_exec_creds()
• BZ - 1701245 - CVE-2019-3901 kernel: perf_event_open() and execve() race in setuid programs allows a data leak
• BZ - 1701842 - CVE-2019-9503 kernel: brcmfmac frame validation bypass
• BZ - 1702264 - panic handing smb2_reconnect due to a use after free
• BZ - 1709837 - CVE-2019-11884 kernel: sensitive information disclosure from kernel stack memory via HIDPCONNADD command
• BZ - 1711520 - IPSet List - Size in Memory Wildly Inconsistent
• BZ - 1715554 - CVE-2019-12382 kernel: unchecked kstrdup of fwstr in drm_load_edid_firmware leads to denial of service
• BZ - 1716328 - CVE-2018-7191 kernel: denial of service via ioctl call in network tun handling
• BZ - 1727756 - CVE-2019-13233 kernel: use-after-free in arch/x86/lib/insn-eval.c
• BZ - 1729931 - CVE-2019-10638 Kernel: net: weak IP ID generation leads to remote device tracking
• BZ - 1729933 - CVE-2019-10639 Kernel: net: using kernel space address bits to derive IP ID may potentially break KASLR
• BZ - 1733347 - NFSv4.0 client sending a double CLOSE (leading to EIO application failure)
• BZ - 1733874 - CVE-2019-10207 kernel: null-pointer dereference in hci_uart_set_flow_control
• BZ - 1734243 - CVE-2019-14283 kernel: integer overflow and OOB read in drivers/block/floppy.c
• BZ - 1735630 - CVE-2019-13648 kernel: denial of service in arch/powerpc/kernel/signal_32.c and arch/powerpc/kernel/signal_64.c via sigreturn() system call
• BZ - 1735655 - CVE-2015-9289 kernel: out of bound read in DVB connexant driver.
• BZ - 1749390 - VFS: Busy inodes after unmount of loop0 when encountering duplicate directory inodes
• BZ - 1750577 - RHEL 7.7 long I/O stalls with bnx2fc from not masking off scope bits of retry delay value
• BZ - 1750813 - CVE-2019-15916 kernel: memory leak in register_queue_kobjects() in net/core/net-sysfs.c leads to denial of service
• BZ - 1757325 - perf top -p PID does not show anything
• BZ - 1757872 - crash in is_size_safe_to_change in 3.10.0-1062.el7 kernel as a result of another condition / race similar to earlier bug 1580165
• BZ - 1758001 - fix compat statfs64() returning EOVERFLOW for when _FILE_OFFSET_BITS=64
• BZ - 1760294 - kernel: seccomp: wrong return value for blocked syscalls on s390x
• BZ - 1760306 - CVE-2019-16746 kernel: buffer-overflow hardening in WiFi beacon validation code.
• BZ - 1770404 - CIFS client system hung with all cpus at 100% inside smb2_reconnect spinning on TCP_Server_Info.response_q.lock spinlock
• BZ - 1777825 - CVE-2019-18660 kernel: (powerpc) incomplete Spectre-RSB mitigation leads to information exposure

CVEs

• CVE-2015-9289
• CVE-2017-17807
• CVE-2018-7191
• CVE-2018-19985
• CVE-2018-20169
• CVE-2019-3901
• CVE-2019-5108
• CVE-2019-9503
• CVE-2019-10207
• CVE-2019-10638
• CVE-2019-10639
• CVE-2019-11190
• CVE-2019-11884
• CVE-2019-12382
• CVE-2019-13233
• CVE-2019-13648
• CVE-2019-14283
• CVE-2019-14814
• CVE-2019-14815
• CVE-2019-15090
• CVE-2019-15214
• CVE-2019-15221
• CVE-2019-15916
• CVE-2019-16746
• CVE-2019-18660

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.8_release_notes/index