rhsa-2020_4062
Vulnerability from csaf_redhat
Published
2020-09-29 19:00
Modified
2024-11-05 22:46
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 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.
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: 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.
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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"category": "description",
"text": "An out of bounds (OOB) memory access flaw was found in i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c in I2C subsystem. A read request for length (data-\u003eblock[0]) greater than \u0027I2C_SMBUS_BLOCK_MAX + 1\u0027 may cause underlying I2C driver write out of array\u0027s boundary. This could allow a local attacker with special user privilege (or root) to crash the system or leak kernel internal information.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c",
"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": "external",
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{
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},
{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18551"
}
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"title": "kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c"
},
{
"cve": "CVE-2018-20836",
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"ids": [
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"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u2019s implementation of the SAS expander subsystem, where a race condition exists in the smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c. An attacker could abuse this flaw to corrupt memory and escalate privileges.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free",
"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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"title": "Vulnerability summary"
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"name": "Execution with Unnecessary Privileges"
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{
"category": "description",
"text": "A vulnerability was found in the Linux kernel\u2019s implementation of the AF_ISDN protocol, which does not enforce the CAP_NET_RAW capability. This flaw can allow unprivileged users to create a raw socket for this protocol. This could further allow the user to control the availability of an existing ISDN circuit.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: unprivileged users able to create RAW sockets in AF_ISDN network protocol",
"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",
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}
],
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{
"cve": "CVE-2019-19055",
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{
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"text": "A flaw was found in the Linux kernel. The Wireless configuration API functionality mishandles resource cleanup in nl80211_get_ftm_responder_stats function. An attacker able to trigger the resource cleanup code path could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.",
"title": "Vulnerability description"
},
{
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"text": "kernel: memory leak in the nl80211_get_ftm_responder_stats() function in net/wireless/nl80211.c allows DoS",
"title": "Vulnerability summary"
},
{
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"text": "This issue is rated as having Moderate impact because of the preconditions needed to trigger the resource cleanup code path.",
"title": "Statement"
},
{
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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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"category": "self",
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"url": "https://access.redhat.com/security/cve/CVE-2019-19055"
},
{
"category": "external",
"summary": "RHBZ#1775074",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1775074"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2019-19055",
"url": "https://www.cve.org/CVERecord?id=CVE-2019-19055"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-19055",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19055"
}
],
"release_date": "2019-10-05T00:00:00+00:00",
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"title": "kernel: memory leak in the nl80211_get_ftm_responder_stats() function in net/wireless/nl80211.c allows DoS"
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{
"cve": "CVE-2019-19058",
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"name": "Uncontrolled Resource Consumption"
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"ids": [
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"text": "1775047"
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"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel. The Intel Wireless WiFi MVM Firmware driver mishandles resource cleanup during device coredump. An attacker able to trigger the device coredump and system-wide out of memory conditions at the same time could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c allows for a DoS",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (system-wide out-of-memory condition).",
"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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},
{
"category": "external",
"summary": "RHBZ#1775047",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1775047"
},
{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2019-19058"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-19058",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19058"
}
],
"release_date": "2019-11-21T00:00:00+00:00",
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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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"title": "kernel: A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c allows for a DoS"
},
{
"cve": "CVE-2019-19059",
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"ids": [
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"notes": [
{
"category": "description",
"text": "A flaw was found in the way the Intel Wireless driver in the Linux kernel handled resource cleanup during Gen 3 device initialization. This flaw allows an attacker with the ability to restrict access to DMA coherent memory on device initialization, to crash the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "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",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (ability to restrict access to dma coherent memory on device initialization).",
"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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{
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{
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-19059",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19059"
}
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"release_date": "2019-11-21T00:00:00+00:00",
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"title": "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"
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"text": "A flaw was found in the Linux kernel. The crypto_report function mishandles resource cleanup on error. A local attacker able to induce the error conditions could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: memory leak in the crypto_report() function in crypto/crypto_user_base.c allows for DoS",
"title": "Vulnerability summary"
},
{
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"text": "This issue is rated as having Low impact because of the preconditions needed to trigger the error cleanup code path.",
"title": "Statement"
},
{
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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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{
"category": "external",
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{
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},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-19062",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19062"
}
],
"release_date": "2019-11-21T00:00:00+00:00",
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"text": "A flaw was found in the Linux kernel. The rtl_usb_probe function mishandles resource cleanup on error. An attacker able to induce the error conditions could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.",
"title": "Vulnerability description"
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"text": "kernel: Two memory leaks in the rtl_usb_probe() function in drivers/net/wireless/realtek/rtlwifi/usb.c allow for a DoS",
"title": "Vulnerability summary"
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{
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"text": "This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (physical access).",
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},
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{
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}
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"text": "An out-of-bounds memory write issue was found in the way the Linux kernel\u0027s KVM hypervisor handled the \u0027KVM_GET_EMULATED_CPUID\u0027 ioctl(2) request to get CPUID features emulated by the KVM hypervisor. A user or process able to access the \u0027/dev/kvm\u0027 device could use this flaw to crash the system, resulting in a denial of service.",
"title": "Vulnerability description"
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"text": "Kernel: kvm: OOB memory write via kvm_dev_ioctl_get_cpuid",
"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.",
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"title": "Vulnerability description"
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"title": "Vulnerability description"
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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": "A flaw was found in the Linux kernel, where there is a race condition bug that can be caused by a malicious USB device in the USB character device driver layer. An attacker who can hotplug at least two devices of this class can cause a use-after-free situation.",
"title": "Vulnerability description"
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"text": "kernel: race condition caused by a malicious USB device in the USB character device driver layer",
"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.",
"title": "CVSS score applicability"
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"text": "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",
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"title": "Vulnerability description"
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"text": "kernel: use-after-free in sound/core/timer.c",
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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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{
"category": "external",
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{
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},
{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20636"
}
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"name": "Cleartext Transmission of Sensitive Information"
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"ids": [
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"notes": [
{
"category": "description",
"text": "A flaw was found in the Linux kernel\u0027s implementation of some networking protocols in IPsec, such as VXLAN and GENEVE tunnels over IPv6. When an encrypted tunnel is created between two hosts, the kernel isn\u0027t correctly routing tunneled data over the encrypted link; rather sending the data unencrypted. This would allow anyone in between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: some ipv6 protocols not encrypted over ipsec tunnel",
"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",
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},
{
"category": "external",
"summary": "RHBZ#1809833",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1809833"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-1749",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-1749"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-1749",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-1749"
}
],
"release_date": "2020-03-04T01:29:00+00:00",
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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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"name": "Exposure of Sensitive Information to an Unauthorized Actor"
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"ids": [
{
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"text": "1805135"
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"notes": [
{
"category": "description",
"text": "A flaw was found in the way KVM hypervisor handled instruction emulation for the L2 guest when nested(=1) virtualization is enabled. In the instruction emulation, the L2 guest could trick the L0 hypervisor into accessing sensitive bits of the L1 hypervisor. An L2 guest could use this flaw to potentially access information of the L1 hypervisor.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "Kernel: kvm: nVMX: L2 guest may trick the L0 hypervisor to access sensitive L1 resources",
"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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"text": "This issue is rated as having Low impact as there is a need for high privilege access to trigger this problem. This will need an access to /dev/ptpX which is privileged operation, also removing the module is needed (again, privileged operation).",
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"title": "Vulnerability description"
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"title": "Vulnerability description"
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{
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"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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"summary": "https://www.openwall.com/lists/oss-security/2020/04/30/5",
"url": "https://www.openwall.com/lists/oss-security/2020/04/30/5"
}
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{
"category": "self",
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"url": "https://access.redhat.com/security/cve/CVE-2020-11565"
},
{
"category": "external",
"summary": "RHBZ#1824918",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1824918"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-11565",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-11565"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-11565",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11565"
}
],
"release_date": "2020-04-01T00:00:00+00:00",
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{
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"ids": [
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{
"category": "description",
"text": "A vulnerability was found in sg_write in drivers/scsi/sg.c in the SCSI generic (sg) driver subsystem. This flaw allows an attacker with local access and special user or root privileges to cause a denial of service if the allocated list is not cleaned with an invalid (Sg_fd * sfp) pointer at the time of failure, also possibly causing a kernel internal information leak problem.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: sg_write function lacks an sg_remove_request call in a certain failure case",
"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",
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"url": "https://access.redhat.com/security/cve/CVE-2020-12770"
},
{
"category": "external",
"summary": "RHBZ#1834845",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1834845"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-12770",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-12770"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-12770",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12770"
}
],
"release_date": "2020-04-14T00:00:00+00:00",
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"ids": [
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{
"category": "description",
"text": "A flaw was found in the Linux kernel loose validation of 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: possible to send arbitrary signals to a privileged (suidroot) parent process",
"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",
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"url": "https://access.redhat.com/security/cve/CVE-2020-12826"
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{
"category": "external",
"summary": "RHBZ#1822077",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1822077"
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{
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},
{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12826"
},
{
"category": "external",
"summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1e7fd6462ca9fc76650fbe6ca800e35b24267da",
"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1e7fd6462ca9fc76650fbe6ca800e35b24267da"
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{
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},
{
"category": "external",
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"title": "kernel: possible to send arbitrary signals to a privileged (suidroot) parent process"
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"ids": [
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"notes": [
{
"category": "description",
"text": "An out-of-bounds memory write flaw was found in how the Linux kernel\u2019s Voice Over IP H.323 connection tracking functionality handled connections on ipv6 port 1720. This flaw allows an unauthenticated remote user to crash the system, causing a denial of service. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: memory corruption in Voice over IP nf_conntrack_h323 module",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue is rated as having Moderate impact because of being limited to only IPV6 port 1720 being used and if with particular module (nf_conntrack_h323) for Voice Over IP H.323.",
"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",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2020-14305"
},
{
"category": "external",
"summary": "RHBZ#1850716",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1850716"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-14305",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-14305"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-14305",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-14305"
},
{
"category": "external",
"summary": "https://bugs.openvz.org/browse/OVZ-7188",
"url": "https://bugs.openvz.org/browse/OVZ-7188"
},
{
"category": "external",
"summary": "https://patchwork.ozlabs.org/project/netfilter-devel/patch/c2385b5c-309c-cc64-2e10-a0ef62897502@virtuozzo.com/",
"url": "https://patchwork.ozlabs.org/project/netfilter-devel/patch/c2385b5c-309c-cc64-2e10-a0ef62897502@virtuozzo.com/"
}
],
"release_date": "2020-06-09T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2020-09-29T19:00:01+00:00",
"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": "kernel: memory corruption in Voice over IP nf_conntrack_h323 module"
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}
Loading...
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.