rhsa-2019_2865
Vulnerability from csaf_redhat
Published
2019-09-23 12:18
Modified
2024-11-15 04:10
Summary
Red Hat Security Advisory: kpatch-patch security update

Notes

Topic
An update for kpatch-patch is now available for RHEL-7.6. 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
This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. Security Fix(es): * A buffer overflow flaw was found in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host. (CVE-2019-14835) 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.
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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        "text": "An update for kpatch-patch is now available for RHEL-7.6.\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.",
        "title": "Topic"
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        "text": "This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel.\n\nSecurity Fix(es):\n\n* A buffer overflow flaw was found in the way Linux kernel\u0027s vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host. (CVE-2019-14835)\n\nFor 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.",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Peter Pi"
          ],
          "organization": "Tencent Blade Team"
        }
      ],
      "cve": "CVE-2019-14835",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
      "discovery_date": "2019-09-10T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1750727"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A buffer overflow flaw was found in the way Linux kernel\u0027s vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this flaw to increase their privileges on the host. In the worst case (and likely most common virtualization) scenario this flaw affects KVM/qemu hypervisor enabled  hosts running Linux guests.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: vhost-net: guest to host kernel escape during migration",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Product Security is aware of this issue. Updates will be released as they become available. For additional information, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/security/vulnerabilities/kernel-vhost",
          "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"
        }
      ],
      "product_status": {
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          "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-0:1-1.el7.x86_64",
          "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-debuginfo-0:1-1.el7.ppc64le",
          "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-debuginfo-0:1-1.el7.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-14835"
        },
        {
          "category": "external",
          "summary": "RHBZ#1750727",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1750727"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-14835",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-14835"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-14835",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-14835"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/security/vulnerabilities/kernel-vhost",
          "url": "https://access.redhat.com/security/vulnerabilities/kernel-vhost"
        },
        {
          "category": "external",
          "summary": "https://www.openwall.com/lists/oss-security/2019/09/17/1",
          "url": "https://www.openwall.com/lists/oss-security/2019/09/17/1"
        }
      ],
      "release_date": "2019-09-17T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2019-09-23T12:18:23+00:00",
          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
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            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-0:1-1.el7.src",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-0:1-1.el7.x86_64",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-debuginfo-0:1-1.el7.ppc64le",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-debuginfo-0:1-1.el7.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2019:2865"
        },
        {
          "category": "workaround",
          "details": "For mitigation related information, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/security/vulnerabilities/kernel-vhost",
          "product_ids": [
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            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-0:1-1.el7.src",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-0:1-1.el7.x86_64",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-debuginfo-0:1-1.el7.ppc64le",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-debuginfo-0:1-1.el7.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.0"
          },
          "products": [
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-0:1-1.el7.ppc64le",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-0:1-1.el7.src",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-0:1-1.el7.x86_64",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-debuginfo-0:1-1.el7.ppc64le",
            "7Server-7.6.EUS:kpatch-patch-3_10_0-957_35_1-debuginfo-0:1-1.el7.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: vhost-net: guest to host kernel escape during migration"
    }
  ]
}


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