RHSA-2015:0884

Vulnerability from csaf_redhat - Published: 2015-04-23 13:04 - Updated: 2025-11-21 17:52
Summary
Red Hat Security Advisory: novnc security update

Notes

Topic
An updated novnc package that fixes one security issue is now available for Red Hat Enterprise Linux OpenStack Platform 4.0. Red Hat Product Security has rated this update as having Moderate 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 novnc package provides a VNC client that uses HTML5 (Web Sockets, Canvas) and includes encryption support. It was discovered that noVNC did not properly set the 'secure' flag when issuing cookies. An attacker could use this flaw to intercept cookies via a man-in-the-middle attack. (CVE-2013-7436) All novnc users are advised to upgrade to this updated package, which corrects this issue.
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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{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
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        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An updated novnc package that fixes one security issue is now available for\nRed Hat Enterprise Linux OpenStack Platform 4.0.\n\nRed Hat Product Security has rated this update as having Moderate security\nimpact. A Common Vulnerability Scoring System (CVSS) base score, which\ngives a detailed severity rating, is available from the CVE link in the\nReferences section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "The novnc package provides a VNC client that uses HTML5 (Web Sockets,\nCanvas) and includes encryption support.\n\nIt was discovered that noVNC did not properly set the \u0027secure\u0027 flag when\nissuing cookies. An attacker could use this flaw to intercept cookies via a\nman-in-the-middle attack. (CVE-2013-7436)\n\nAll novnc users are advised to upgrade to this updated package, which\ncorrects this issue.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "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.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2015:0884",
        "url": "https://access.redhat.com/errata/RHSA-2015:0884"
      },
      {
        "category": "external",
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        "url": "https://access.redhat.com/security/updates/classification/#moderate"
      },
      {
        "category": "external",
        "summary": "1193451",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1193451"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2015/rhsa-2015_0884.json"
      }
    ],
    "title": "Red Hat Security Advisory: novnc security update",
    "tracking": {
      "current_release_date": "2025-11-21T17:52:24+00:00",
      "generator": {
        "date": "2025-11-21T17:52:24+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.6.12"
        }
      },
      "id": "RHSA-2015:0884",
      "initial_release_date": "2015-04-23T13:04:07+00:00",
      "revision_history": [
        {
          "date": "2015-04-23T13:04:07+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2015-04-23T13:04:07+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2025-11-21T17:52:24+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux OpenStack Platform 4.0",
                "product": {
                  "name": "Red Hat Enterprise Linux OpenStack Platform 4.0",
                  "product_id": "6Server-RHOS-4.0",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:openstack:4::el6"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat OpenStack Platform"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "novnc-0:0.5.1-2.el6ost.src",
                "product": {
                  "name": "novnc-0:0.5.1-2.el6ost.src",
                  "product_id": "novnc-0:0.5.1-2.el6ost.src",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/novnc@0.5.1-2.el6ost?arch=src"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "src"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "novnc-0:0.5.1-2.el6ost.noarch",
                "product": {
                  "name": "novnc-0:0.5.1-2.el6ost.noarch",
                  "product_id": "novnc-0:0.5.1-2.el6ost.noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/novnc@0.5.1-2.el6ost?arch=noarch"
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                }
              }
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            "category": "architecture",
            "name": "noarch"
          }
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        "category": "vendor",
        "name": "Red Hat"
      }
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    "relationships": [
      {
        "category": "default_component_of",
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          "product_id": "6Server-RHOS-4.0:novnc-0:0.5.1-2.el6ost.noarch"
        },
        "product_reference": "novnc-0:0.5.1-2.el6ost.noarch",
        "relates_to_product_reference": "6Server-RHOS-4.0"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "novnc-0:0.5.1-2.el6ost.src as a component of Red Hat Enterprise Linux OpenStack Platform 4.0",
          "product_id": "6Server-RHOS-4.0:novnc-0:0.5.1-2.el6ost.src"
        },
        "product_reference": "novnc-0:0.5.1-2.el6ost.src",
        "relates_to_product_reference": "6Server-RHOS-4.0"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2013-7436",
      "cwe": {
        "id": "CWE-319",
        "name": "Cleartext Transmission of Sensitive Information"
      },
      "discovery_date": "2015-02-17T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1193451"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "It was discovered that noVNC did not properly set the \u0027secure\u0027 flag when issuing cookies. An attacker could use this flaw to intercept cookies via a man-in-the-middle attack.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "novnc: session hijack through insecurely set session token cookies",
          "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"
        }
      ],
      "product_status": {
        "fixed": [
          "6Server-RHOS-4.0:novnc-0:0.5.1-2.el6ost.noarch",
          "6Server-RHOS-4.0:novnc-0:0.5.1-2.el6ost.src"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2013-7436"
        },
        {
          "category": "external",
          "summary": "RHBZ#1193451",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1193451"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2013-7436",
          "url": "https://www.cve.org/CVERecord?id=CVE-2013-7436"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2013-7436",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-7436"
        }
      ],
      "release_date": "2013-10-28T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2015-04-23T13:04:07+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": [
            "6Server-RHOS-4.0:novnc-0:0.5.1-2.el6ost.noarch",
            "6Server-RHOS-4.0:novnc-0:0.5.1-2.el6ost.src"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2015:0884"
        }
      ],
      "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": [
            "6Server-RHOS-4.0:novnc-0:0.5.1-2.el6ost.noarch",
            "6Server-RHOS-4.0:novnc-0:0.5.1-2.el6ost.src"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "novnc: session hijack through insecurely set session token cookies"
    }
  ]
}


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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.