RHSA-2016_0277

Vulnerability from csaf_redhat - Published: 2016-02-19 22:19 - Updated: 2024-11-14 15:36
Summary
Red Hat Security Advisory: rhev-hypervisor security update
Severity
Critical
Notes
Topic: Updated rhev-hypervisor packages that fix one security issue are now available. Red Hat Product Security has rated this update as having Critical security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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. Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions. A stack-based buffer overflow was found in the way the libresolv library performed dual A/AAAA DNS queries. A remote attacker could create a specially crafted DNS response which could cause libresolv to crash or, potentially, execute code with the permissions of the user running the library. Note: this issue is only exposed when libresolv is called from the nss_dns NSS service module. (CVE-2015-7547) This issue was discovered by the Google Security Team and Red Hat. Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to these updated packages.
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.
CVE-2015-7547

A stack-based buffer overflow was found in the way the libresolv library performed dual A/AAAA DNS queries. A remote attacker could create a specially crafted DNS response which could cause libresolv to crash or, potentially, execute code with the permissions of the user running the library. Note: this issue is only exposed when libresolv is called from the nss_dns NSS service module.

6.8 ()
AV:N/AC:M/Au:N/C:P/I:P/A:P
CWE-121 - Stack-based Buffer Overflow
Affected products
Product Identifier Version Remediation
Unresolved product id: 6Server-RHEV-Hypervisor:rhev-hypervisor6-0:6.7-20160104.2.el6ev.noarch —
Vendor Fix fix
Unresolved product id: 6Server-RHEV-Hypervisor:rhev-hypervisor7-0:7.2-20160105.2.el6ev.noarch —
Vendor Fix fix
Unresolved product id: 6Server-RHEV-Hypervisor:rhev-hypervisor7-0:7.2-20160105.2.el6ev.src —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-Hypervisor-7:rhev-hypervisor7-0:7.2-20160105.2.el7ev.noarch —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-Hypervisor-7:rhev-hypervisor7-0:7.2-20160105.2.el7ev.src —
Vendor Fix fix
Threats
Impact Critical
References
Acknowledgments
Google Security Team
To clipboard 

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          "date": "2016-02-19T22:19:14+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",
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      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "products": [
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            "6Server-RHEV-Hypervisor:rhev-hypervisor7-0:7.2-20160105.2.el6ev.noarch",
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Critical"
        }
      ],
      "title": "glibc: getaddrinfo stack-based buffer overflow"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.