rhsa-2021_1739
Vulnerability from csaf_redhat
Published
2021-05-18 16:07
Modified
2024-09-13 22:45
Summary
Red Hat Security Advisory: kernel-rt security and bug fix update
Notes
Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 8.
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.
Details
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: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)
* kernel: use-after-free caused by a malicious USB device in the drivers/usb/misc/adutux.c driver (CVE-2019-19523)
* kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver (CVE-2019-19528)
* kernel: possible out of bounds write in kbd_keycode of keyboard.c (CVE-2020-0431)
* kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)
* kernel: use-after-free in usb_sg_cancel function in drivers/usb/core/message.c (CVE-2020-12464)
* kernel: buffer uses out of index in ext3/4 filesystem (CVE-2020-14314)
* kernel: Use After Free vulnerability in cgroup BPF component (CVE-2020-14356)
* kernel: NULL pointer dereference in serial8250_isa_init_ports function in drivers/tty/serial/8250/8250_core.c (CVE-2020-15437)
* kernel: umask not applied on filesystem without ACL support (CVE-2020-24394)
* kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)
* kernel: incomplete permission checking for access to rbd devices (CVE-2020-25284)
* kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c (CVE-2020-25285)
* kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow (CVE-2020-25643)
* kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)
* kernel: use-after-free in kernel midi subsystem (CVE-2020-27786)
* kernel: child process is able to access parent mm through hfi dev file handle (CVE-2020-27835)
* kernel: slab-out-of-bounds read in fbcon (CVE-2020-28974)
* kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)
* kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege (CVE-2021-0342)
* kernel: NULL pointer dereferences in ov511_mode_init_regs and ov518_mode_init_regs in drivers/media/usb/gspca/ov519.c (CVE-2020-11608)
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 8.4 Release Notes linked from the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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{
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{
"category": "description",
"text": "A use-after-free flaw was found in iowarrior_disconnect in iowarrior USB driver module were a flag was simultaneously modified causing a race between a device open and disconnect. This flaw could allow a physical attacker to cause a denial of service (DoS) attack. This vulnerability could even lead to a kernel information leak problem.",
"title": "Vulnerability description"
},
{
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"text": "kernel: use-after-free bug caused by a malicious USB device in the drivers/usb/misc/iowarrior.c driver",
"title": "Vulnerability summary"
},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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{
"cve": "CVE-2020-12114",
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},
{
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"title": "Vulnerability summary"
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{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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{
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"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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{
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"id": "CWE-190",
"name": "Integer Overflow or Wraparound"
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"ids": [
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{
"category": "description",
"text": "A flaw was found in the Linux kernel. An integer overflow in the firmware for some Intel(R) Graphics Drivers may allow a privileged user to potentially enable an escalation of privilege via local access. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"title": "Vulnerability description"
},
{
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"text": "kernel: Integer overflow in Intel(R) Graphics Drivers",
"title": "Vulnerability summary"
},
{
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"text": "Only users that specify i915.enable_guc=-1 or i915.enable_guc=1 or 2 are open to be exploited by this issue.\n\nDue to the full fix (combination of kernel and firmware updates) being invasive and GUC firmware loading is off by default, Red Hat Enterprise Linux kernel versions prior to the Linux kernel version shipped with Red Hat Enterprise Linux 8.4 GA (kernel-4.18.0-305.el8) print a warning in the kernel log (\"GUC firmware is insecure - CVE 2020-12362 - Please update to a newer release to get secure GUC\") and do not rely on the firmware fix. As a result, Red Hat Enterprise Linux versions prior Red Hat Enterprise Linux 8.4 GA (including Red Hat Enterprise Linux 6 and 7) do not include the updated firmware packages.",
"title": "Statement"
},
{
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},
{
"category": "external",
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},
{
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-12362",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12362"
}
],
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{
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},
{
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},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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},
{
"cve": "CVE-2020-25284",
"cwe": {
"id": "CWE-732",
"name": "Incorrect Permission Assignment for Critical Resource"
},
"discovery_date": "2020-09-25T00:00:00+00:00",
"ids": [
{
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"text": "1882594"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the capabilities check of the rados block device functionality in the Linux kernel. Incorrect capability checks could alllow a local user with root priviledges (but no capabilities) to add or remove Rados Block Devices from the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: incomplete permission checking for access to rbd devices",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2020-25284"
},
{
"category": "external",
"summary": "RHBZ#1882594",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1882594"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-25284",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-25284"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-25284",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25284"
}
],
"release_date": "2020-09-13T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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"title": "Statement"
},
{
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},
{
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"title": "kernel: race condition between hugetlb sysctl handlers in mm/hugetlb.c"
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{
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"names": [
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],
"organization": "Security Research Lab"
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"name": "Improper Input Validation"
},
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{
"category": "description",
"text": "A flaw was found in the HDLC_PPP module of the Linux kernel. Memory corruption and a read overflow is caused by improper input validation in the ppp_cp_parse_cr function which can cause the system to crash or cause a denial of service. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow",
"title": "Vulnerability summary"
},
{
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"text": "This flaw is rated as a having Moderate impact, because the bug can be triggered only if PPP protocol enabled.",
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},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"title": "kernel: child process is able to access parent mm through hfi dev file handle"
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{
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"names": [
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"name": "Out-of-bounds Read"
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"text": "1903126"
}
],
"notes": [
{
"category": "description",
"text": "An out-of-bounds (OOB) SLAB memory access flaw was found in the Linux kernel\u0027s fbcon driver module. A bounds check failure allows a local attacker with special user privileges to gain access to out-of-bounds memory, leading to a system crash or leaking of internal kernel information. The highest threat from this vulnerability is to system availability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: slab-out-of-bounds read in fbcon",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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],
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"name": "Improper Initialization"
},
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{
"category": "description",
"text": "A flaw possibility of race condition and incorrect initialization of the process id was found in the Linux kernel child/parent process identification handling while filtering signal handlers. A local attacker is able to abuse this flaw to bypass checks to send any signal to a privileged process.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting -\u003ereal_parent",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The incorrect initialization of the process id affects Red Hat Enterprise Linux only.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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{
"category": "self",
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"url": "https://access.redhat.com/security/cve/CVE-2020-35508"
},
{
"category": "external",
"summary": "RHBZ#1902724",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1902724"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-35508",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-35508"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-35508",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-35508"
}
],
"release_date": "2020-12-09T10:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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{
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"notes": [
{
"category": "description",
"text": "A use-after-free flaw was found in the packet processing context in net/netfilter/x_tables.c in netfilter in the Linux Kernel. This issue occurs when the per-CPU sequence count is mishandled during concurrent iptables rules replacement and can be exploited with the CAP_NET_ADMIN capability in an unprivileged namespace.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: netfilter: use-after-free in the packet processing context",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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{
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-36694",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36694"
},
{
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"summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc00bcaa589914096edef7fb87ca5cee4a166b5c",
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"title": "kernel: netfilter: use-after-free in the packet processing context"
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{
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"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2021-01-13T00:00:00+00:00",
"ids": [
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{
"category": "description",
"text": "A flaw use after free in the Linux kernel TUN/TAP device driver functionality was found in the way user create and use tun/tap device. A local user could use this flaw to crash the system or possibly escalate their privileges on the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: use after free in tun_get_user of tun.c could lead to local escalation of privilege",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw is rated as having Moderate impact because of the need to have elevated privileges and non-standard configuration of the networking device.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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"text": "kernel: remote DoS in TIPC kernel module",
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{
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"text": "Red Hat Enterprise Linux 6 and 7 are not affected by this issue as they did not include the affected code in `tipc_link_xmit`, introduced in upstream kernel version 4.3 (commit af9b028 \"tipc: make media xmit call outside node spinlock context\").",
"title": "Statement"
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: remote DoS in TIPC kernel module"
}
]
}
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