suse-su-2018:3490-1
Vulnerability from csaf_suse
Published
2018-10-26 11:09
Modified
2018-10-26 11:09
Summary
Security update for xen

Notes

Title of the patch
Security update for xen
Description of the patch
This update for xen fixes the following issues: XEN was updated to the Xen 4.9.3 bug fix only release (bsc#1027519) - CVE-2018-17963: qemu_deliver_packet_iov accepted packet sizes greater than INT_MAX, which allows attackers to cause a denial of service or possibly have unspecified other impact. (bsc#1111014) - CVE-2018-15470: oxenstored might not have enforced the configured quota-maxentity. This allowed a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS. (XSA-272) (bsc#1103279) - CVE-2018-15469: ARM never properly implemented grant table v2, either in the hypervisor or in Linux. Unfortunately, an ARM guest can still request v2 grant tables; they will simply not be properly set up, resulting in subsequent grant-related hypercalls hitting BUG() checks. An unprivileged guest can cause a BUG() check in the hypervisor, resulting in a denial-of-service (crash). (XSA-268) (bsc#1103275) Note that SUSE does not ship ARM Xen, so we are not affected. - CVE-2018-15468: The DEBUGCTL MSR contains several debugging features, some of which virtualise cleanly, but some do not. In particular, Branch Trace Store is not virtualised by the processor, and software has to be careful to configure it suitably not to lock up the core. As a result, it must only be available to fully trusted guests. Unfortunately, in the case that vPMU is disabled, all value checking was skipped, allowing the guest to choose any MSR_DEBUGCTL setting it likes. A malicious or buggy guest administrator (on Intel x86 HVM or PVH) can lock up the entire host, causing a Denial of Service. (XSA-269) (bsc#1103276) - CVE-2018-3646: Systems with microprocessors utilizing speculative execution and address translations may have allowed unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis. (XSA-273) (bsc#1091107) Non security issues fixed: - The affinity reporting via 'xl vcpu-list' was broken (bsc#1106263) - Kernel oops in fs/dcache.c called by d_materialise_unique() (bsc#1094508)
Patchnames
SUSE-SLE-DESKTOP-12-SP3-2018-2492,SUSE-SLE-SDK-12-SP3-2018-2492,SUSE-SLE-SERVER-12-SP3-2018-2492
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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  "vulnerabilities": [
    {
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          "text": "An issue was discovered in Xen through 4.11.x. The DEBUGCTL MSR contains several debugging features, some of which virtualise cleanly, but some do not. In particular, Branch Trace Store is not virtualised by the processor, and software has to be careful to configure it suitably not to lock up the core. As a result, it must only be available to fully trusted guests. Unfortunately, in the case that vPMU is disabled, all value checking was skipped, allowing the guest to choose any MSR_DEBUGCTL setting it likes. A malicious or buggy guest administrator (on Intel x86 HVM or PVH) can lock up the entire host, causing a Denial of Service.",
          "title": "CVE description"
        }
      ],
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      "references": [
        {
          "category": "external",
          "summary": "CVE-2018-15468",
          "url": "https://www.suse.com/security/cve/CVE-2018-15468"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1103276 for CVE-2018-15468",
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        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2018-15469"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "An issue was discovered in Xen through 4.11.x. ARM never properly implemented grant table v2, either in the hypervisor or in Linux. Unfortunately, an ARM guest can still request v2 grant tables; they will simply not be properly set up, resulting in subsequent grant-related hypercalls hitting BUG() checks. An unprivileged guest can cause a BUG() check in the hypervisor, resulting in a denial-of-service (crash).",
          "title": "CVE description"
        }
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        {
          "category": "general",
          "text": "An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 \"Operations on data structures\" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS.",
          "title": "CVE description"
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    {
      "cve": "CVE-2018-17963",
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          "text": "https://www.suse.com/security/cve/CVE-2018-17963"
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        {
          "category": "general",
          "text": "qemu_deliver_packet_iov in net/net.c in Qemu accepts packet sizes greater than INT_MAX, which allows attackers to cause a denial of service or possibly have unspecified other impact.",
          "title": "CVE description"
        }
      ],
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      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2018-17963",
          "url": "https://www.suse.com/security/cve/CVE-2018-17963"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1111013 for CVE-2018-17963",
          "url": "https://bugzilla.suse.com/1111013"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1111014 for CVE-2018-17963",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1178658 for CVE-2018-17963",
          "url": "https://bugzilla.suse.com/1178658"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
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      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.0"
          },
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        {
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          "date": "2018-10-26T11:09:27Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2018-17963"
    },
    {
      "cve": "CVE-2018-3646",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2018-3646"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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        },
        {
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        },
        {
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          "summary": "SUSE Bug 1091107 for CVE-2018-3646",
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        },
        {
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          "summary": "SUSE Bug 1099306 for CVE-2018-3646",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1104365 for CVE-2018-3646",
          "url": "https://bugzilla.suse.com/1104365"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1104894 for CVE-2018-3646",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1106548 for CVE-2018-3646",
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        },
        {
          "category": "external",
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        },
        {
          "category": "external",
          "summary": "SUSE Bug 1136865 for CVE-2018-3646",
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        },
        {
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        },
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        }
      ],
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        {
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          },
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      ],
      "threats": [
        {
          "category": "impact",
          "date": "2018-10-26T11:09:27Z",
          "details": "important"
        }
      ],
      "title": "CVE-2018-3646"
    }
  ]
}


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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.
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  • 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.