RHSA-2016:1538

Vulnerability from csaf_redhat - Published: 2016-08-02 18:20 - Updated: 2025-11-21 17:56
Summary
Red Hat Security Advisory: golang security, bug fix, and enhancement update
Severity
Moderate
Notes
Topic: An update for golang is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. 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 golang packages provide the Go programming language compiler. The following packages have been upgraded to a newer upstream version: golang (1.6.3). (BZ#1346331) Security Fix(es): * An input-validation flaw was discovered in the Go programming language built in CGI implementation, which set the environment variable "HTTP_PROXY" using the incoming "Proxy" HTTP-request header. The environment variable "HTTP_PROXY" is used by numerous web clients, including Go's net/http package, to specify a proxy server to use for HTTP and, in some cases, HTTPS requests. This meant that when a CGI-based web application ran, an attacker could specify a proxy server which the application then used for subsequent outgoing requests, allowing a man-in-the-middle attack. (CVE-2016-5386) Red Hat would like to thank Scott Geary (VendHQ) for reporting 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.
CVE-2015-5739

HTTP-request vulnerabilities have been found in the Golang net/http and net/textproto libraries. Request headers with double Content-Length fields do not generate a 400 error (the second field is ignored), and invalid fields are parsed as valid (for example, "Content Length:" with a space in the middle is accepted). A non-authenticated attacker could exploit these flaws to bypass security controls, perform web-cache poisoning, or alter the request/response map (denial of service).

6.8 ()
AV:N/AC:M/Au:N/C:P/I:P/A:P
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2016:1538
CVE-2015-5740

HTTP-request vulnerabilities have been found in the Golang net/http and net/textproto libraries. Request headers with double Content-Length fields do not generate a 400 error (the second field is ignored), and invalid fields are parsed as valid (for example, "Content Length:" with a space in the middle is accepted). A non-authenticated attacker could exploit these flaws to bypass security controls, perform web-cache poisoning, or alter the request/response map (denial of service).

6.8 ()
AV:N/AC:M/Au:N/C:P/I:P/A:P
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2016:1538
CVE-2015-5741

HTTP-request vulnerabilities have been found in the Golang net/http and net/textproto libraries. Request headers with double Content-Length fields do not generate a 400 error (the second field is ignored), and invalid fields are parsed as valid (for example, "Content Length:" with a space in the middle is accepted). A non-authenticated attacker could exploit these flaws to bypass security controls, perform web-cache poisoning, or alter the request/response map (denial of service).

6.8 ()
AV:N/AC:M/Au:N/C:P/I:P/A:P
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2016:1538
CVE-2016-3959

A denial of service vulnerability was found in Go's verification of DSA public keys. An attacker could provide a crafted key to HTTPS client or SSH server libraries which would cause the application to enter an infinite loop.

5.3 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2016:1538
CVE-2016-5386

An input-validation flaw was discovered in the Go programming language built in CGI implementation, which set the environment variable "HTTP_PROXY" using the incoming "Proxy" HTTP-request header. The environment variable "HTTP_PROXY" is used by numerous web clients, including Go's net/http package, to specify a proxy server to use for HTTP and, in some cases, HTTPS requests. This meant that when a CGI-based web application ran, an attacker could specify a proxy server which the application then used for subsequent outgoing requests, allowing a man-in-the-middle attack.

5.0 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
CWE-20 - Improper Input Validation
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2016:1538
References
Acknowledgments
VendHQ Scott Geary
To clipboard 

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          "title": "Vulnerability description"
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        {
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          "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.",
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          "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"
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      ],
      "product_status": {
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2015-5740"
        },
        {
          "category": "external",
          "summary": "RHBZ#1250352",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1250352"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2015-5740",
          "url": "https://www.cve.org/CVERecord?id=CVE-2015-5740"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2015-5740",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-5740"
        }
      ],
      "release_date": "2015-07-29T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2016-08-02T18:20:29+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": [
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          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2016:1538"
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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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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "golang: HTTP request smuggling in net/http library"
    },
    {
      "cve": "CVE-2015-5741",
      "cwe": {
        "id": "CWE-444",
        "name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
      },
      "discovery_date": "2015-07-29T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1250352"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "HTTP-request vulnerabilities have been found in the Golang net/http and net/textproto libraries. Request headers with double Content-Length fields do not generate a 400 error (the second field is ignored), and invalid fields are parsed as valid (for example, \"Content Length:\" with a space in the middle is accepted).  A non-authenticated attacker could exploit these flaws to bypass security controls, perform web-cache poisoning, or alter the request/response map (denial of service).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang: HTTP request smuggling in net/http library",
          "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": [
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2015-5741"
        },
        {
          "category": "external",
          "summary": "RHBZ#1250352",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1250352"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2015-5741",
          "url": "https://www.cve.org/CVERecord?id=CVE-2015-5741"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2015-5741",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-5741"
        }
      ],
      "release_date": "2015-07-29T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2016-08-02T18:20:29+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": [
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2016:1538"
        }
      ],
      "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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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "golang: HTTP request smuggling in net/http library"
    },
    {
      "cve": "CVE-2016-3959",
      "cwe": {
        "id": "CWE-835",
        "name": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
      },
      "discovery_date": "2016-04-05T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1324343"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A denial of service vulnerability was found in Go\u0027s verification of DSA public keys.  An attacker could provide a crafted key to HTTPS client or SSH server libraries which would cause the application to enter an infinite loop.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang: infinite loop in several big integer routines",
          "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": [
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          "7Server-optional-7.2.Z:golang-0:1.6.3-1.el7_2.1.x86_64",
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2016-3959"
        },
        {
          "category": "external",
          "summary": "RHBZ#1324343",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1324343"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2016-3959",
          "url": "https://www.cve.org/CVERecord?id=CVE-2016-3959"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2016-3959",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-3959"
        }
      ],
      "release_date": "2016-04-05T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2016-08-02T18:20:29+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": [
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            "7Server-optional-7.2.Z:golang-bin-0:1.6.3-1.el7_2.1.x86_64",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2016:1538"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.0"
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          "products": [
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            "7Server-optional-7.2.Z:golang-bin-0:1.6.3-1.el7_2.1.x86_64",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "golang: infinite loop in several big integer routines"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Scott Geary"
          ],
          "organization": "VendHQ"
        }
      ],
      "cve": "CVE-2016-5386",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "discovery_date": "2016-07-04T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1353798"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An input-validation flaw was discovered in the Go programming language built in CGI implementation, which set the environment variable \"HTTP_PROXY\" using the incoming \"Proxy\" HTTP-request header. The environment variable \"HTTP_PROXY\" is used by numerous web clients, including Go\u0027s net/http package, to specify a proxy server to use for HTTP and, in some cases, HTTPS requests. This meant that when a CGI-based web application ran, an attacker could specify a proxy server which the application then used for subsequent outgoing requests, allowing a man-in-the-middle attack.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Go: sets environmental variable  based on user supplied Proxy request header",
          "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"
        }
      ],
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2016-5386"
        },
        {
          "category": "external",
          "summary": "RHBZ#1353798",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1353798"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2016-5386",
          "url": "https://www.cve.org/CVERecord?id=CVE-2016-5386"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2016-5386",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-5386"
        }
      ],
      "release_date": "2016-07-18T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2016-08-02T18:20:29+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",
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            "7Server-optional-7.2.Z:golang-bin-0:1.6.3-1.el7_2.1.x86_64",
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            "7Server-optional-7.2.Z:golang-misc-0:1.6.3-1.el7_2.1.noarch",
            "7Server-optional-7.2.Z:golang-src-0:1.6.3-1.el7_2.1.noarch",
            "7Server-optional-7.2.Z:golang-tests-0:1.6.3-1.el7_2.1.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2016:1538"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.0"
          },
          "products": [
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            "7Server-optional-7.2.Z:golang-bin-0:1.6.3-1.el7_2.1.x86_64",
            "7Server-optional-7.2.Z:golang-docs-0:1.6.3-1.el7_2.1.noarch",
            "7Server-optional-7.2.Z:golang-misc-0:1.6.3-1.el7_2.1.noarch",
            "7Server-optional-7.2.Z:golang-src-0:1.6.3-1.el7_2.1.noarch",
            "7Server-optional-7.2.Z:golang-tests-0:1.6.3-1.el7_2.1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Go: sets environmental variable  based on user supplied Proxy request header"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.