rhsa-2017_1209
Vulnerability from csaf_redhat
Published
2017-05-09 16:41
Modified
2024-11-05 20:00
Summary
Red Hat Security Advisory: rhev-hypervisor bug fix and enhancement update for RHEV 3.6.11
Notes
Topic
An update for rhev-hypervisor7 is now available for RHEV 3.X Hypervisor and Agents for RHEL-6 and RHEV 3.X Hypervisor and Agents for RHEL-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 rhev-hypervisor package provides a Red Hat Enterprise Virtualization
Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor
is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes
everything necessary to run and manage virtual machines: A subset of the
Red Hat Enterprise Linux operating environment and the Red Hat Enterprise
Virtualization Agent.
Security Fix(es):
* A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074)
Red Hat would like to thank Andrey Konovalov (Google) for reporting this issue.
Note: Red Hat Enterprise Virtualization Hypervisor is only available for
the Intel 64 and AMD64 architectures with virtualization extensions.
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": "summary",
"text": "An update for rhev-hypervisor7 is now available for RHEV 3.X Hypervisor and Agents for RHEL-6 and RHEV 3.X Hypervisor and Agents for RHEL-7.\n\nRed 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.",
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"text": "The rhev-hypervisor package provides a Red Hat Enterprise Virtualization\nHypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor\nis a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes\neverything necessary to run and manage virtual machines: A subset of the\nRed Hat Enterprise Linux operating environment and the Red Hat Enterprise\nVirtualization Agent.\n\nSecurity Fix(es):\n\n* A use-after-free flaw was found in the way the Linux kernel\u0027s Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074)\n\nRed Hat would like to thank Andrey Konovalov (Google) for reporting this issue.\n\nNote: Red Hat Enterprise Virtualization Hypervisor is only available for\nthe Intel 64 and AMD64 architectures with virtualization extensions.",
"title": "Details"
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"references": [
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{
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"summary": "Canonical URL",
"url": "https://security.access.redhat.com/data/csaf/v2/advisories/2017/rhsa-2017_1209.json"
}
],
"title": "Red Hat Security Advisory: rhev-hypervisor bug fix and enhancement update for RHEV 3.6.11",
"tracking": {
"current_release_date": "2024-11-05T20:00:49+00:00",
"generator": {
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"id": "RHSA-2017:1209",
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"vulnerabilities": [
{
"acknowledgments": [
{
"names": [
"Andrey Konovalov"
],
"organization": "Google"
}
],
"cve": "CVE-2017-6074",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2017-02-17T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1423071"
}
],
"notes": [
{
"category": "description",
"text": "A use-after-free flaw was found in the way the Linux kernel\u0027s Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: use after free in dccp protocol",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue affects Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2 kernels.\n\nAs this issue is rated as Important, it has been scheduled to be fixed in a future version of Red Hat Enterprise Linux 5, 6, 7, and Red Hat Enterprise MRG 2 kernels.",
"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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"references": [
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"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2017-6074"
},
{
"category": "external",
"summary": "RHBZ#1423071",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1423071"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2017-6074",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-6074"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-6074",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-6074"
},
{
"category": "external",
"summary": "https://access.redhat.com/node/2934281",
"url": "https://access.redhat.com/node/2934281"
}
],
"release_date": "2017-02-22T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2017-05-09T16:41:44+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",
"product_ids": [
"6Server-RHEV-Hypervisor:rhev-hypervisor7-0:7.3-20170425.0.el6ev.noarch",
"6Server-RHEV-Hypervisor:rhev-hypervisor7-0:7.3-20170425.0.el6ev.src",
"7Server-RHEV-Hypervisor-7:rhev-hypervisor7-0:7.3-20170425.0.el7ev.noarch",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2017:1209"
},
{
"category": "workaround",
"details": "Recent versions of the SELinux policy can mitigate this flaw. The steps below will work with SELinux enabled or disabled.\n\nAs the DCCP module will be auto-loaded when required, its use can be disabled \nby preventing the module from loading with the following instructions:\n\n # echo \"install dccp /bin/true\" \u003e\u003e /etc/modprobe.d/disable-dccp.conf \n \nThe system will need to be restarted if the DCCP modules are loaded. In most circumstances, the DCCP kernel modules will be unable to be unloaded while any network interfaces are active and the protocol is in use.\n\nIf you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.",
"product_ids": [
"6Server-RHEV-Hypervisor:rhev-hypervisor7-0:7.3-20170425.0.el6ev.noarch",
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"7Server-RHEV-Hypervisor-7:rhev-hypervisor7-0:7.3-20170425.0.el7ev.noarch",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.0"
},
"products": [
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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: use after free in dccp protocol"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- 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.