csaf_opensuse - opensuse-su-2021:0375-1

OPENSUSE-SU-2021:0375-1

Vulnerability from csaf_opensuse - Published: 2021-03-03 08:32 - Updated: 2021-03-03 08:32

Summary

Security update for bind

Notes

Title of the patch

Security update for bind

Description of the patch

This update for bind fixes the following issues: - CVE-2020-8625: A vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack [bsc#1182246] This update was imported from the SUSE:SLE-15:Update update project.

Patchnames

openSUSE-2021-375

CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).

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          "text": "BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND\u0027s default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting valid values for the tkey-gssapi-keytab or tkey-gssapi-credentialconfiguration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. The most likely outcome of a successful exploitation of the vulnerability is a crash of the named process. However, remote code execution, while unproven, is theoretically possible. Affects: BIND 9.5.0 -\u003e 9.11.27, 9.12.0 -\u003e 9.16.11, and versions BIND 9.11.3-S1 -\u003e 9.11.27-S1 and 9.16.8-S1 -\u003e 9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 -\u003e 9.17.1 of the BIND 9.17 development branch",
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CVE-2020-8625 (GCVE-0-2020-8625)

Vulnerability from cvelistv5 – Published: 2021-02-17 22:40 – Updated: 2024-09-16 22:40

Summary

BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND's default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting valid values for the tkey-gssapi-keytab or tkey-gssapi-credentialconfiguration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. The most likely outcome of a successful exploitation of the vulnerability is a crash of the named process. However, remote code execution, while unproven, is theoretically possible. Affects: BIND 9.5.0 -> 9.11.27, 9.12.0 -> 9.16.11, and versions BIND 9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 -> 9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch

Severity ?

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

BIND 9.5.0 -> 9.11.27, 9.12.0 -> 9.16.11, and versions BIND 9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 -> 9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch:GSS-TSIG is an extension to the TSIG protocol which is intended to support the secure exchange of keys for use in verifying the authenticity of communications between parties on a network. SPNEGO is a negotiation mechanism used by GSSAPI, the application protocol interface for GSS-TSIG. The SPNEGO implementation used by BIND has been found to be vulnerable to a buffer overflow attack.

Assigner

isc

References

URL

Tags

	https://kb.isc.org/v1/docs/cve-2020-8625	x_refsource_CONFIRM
	https://www.debian.org/security/2021/dsa-4857	vendor-advisoryx_refsource_DEBIAN
	http://www.openwall.com/lists/oss-security/2021/02/19/1	mailing-listx_refsource_MLIST
	https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
	http://www.openwall.com/lists/oss-security/2021/02/20/2	mailing-listx_refsource_MLIST
	https://www.zerodayinitiative.com/advisories/ZDI-…	x_refsource_MISC
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://security.netapp.com/advisory/ntap-2021031…	x_refsource_CONFIRM
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	ISC	BIND9	Affected: Open Source Branches 9.5 though 9.11 9.5.0 through versions before 9.11.28 Affected: Open Source Branches 9.12 though 9.16 9.12.0 through versions before 9.16.12 Affected: Supported Preview Branch 9.11-S 9.11.3-S1 through versions before 9.11.28-S1 Affected: Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.12-S1 Affected: Development Branch 9.17 9.17.0 through versions before 9.17.2

Credits

ISC would like to thank an anonymous party, working in conjunction with Trend Micro Zero Day Initiative, for reporting this issue to us.

Show details on NVD website

JSON

To clipboard

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            },
            {
              "name": "https://www.zerodayinitiative.com/advisories/ZDI-21-195/",
              "refsource": "MISC",
              "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-195/"
            },
            {
              "name": "FEDORA-2021-0595625865",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QWCMBOSZOJIIET7BWTRYS3HLX5TSDKHX/"
            },
            {
              "name": "FEDORA-2021-28f97e232d",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KYXAF7G45RXDVNUTWWCI2CVTHRZ67LST/"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210319-0001/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210319-0001/"
            },
            {
              "name": "FEDORA-2021-8b4744f152",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EBTPWRQWRQEJNWY4NHO4WLS4KLJ3ERHZ/"
            },
            {
              "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
              "refsource": "CONFIRM",
              "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"
            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "Upgrade to the patched release most closely related to your current version of BIND:\n\n    BIND 9.11.28\n    BIND 9.16.12\n\nBIND Supported Preview Edition is a special feature-preview branch of BIND provided to eligible ISC support customers.\n\n    BIND 9.11.28-S1\n    BIND 9.16.12-S1\n\nAcknowledgments: ISC would like to thank an anonymous party, working in conjunction with Trend Micro Zero Day Initiative, for reporting this issue to us."
          }
        ],
        "source": {
          "discovery": "EXTERNAL"
        },
        "work_around": [
          {
            "lang": "en",
            "value": "This vulnerability only affects servers configured to use GSS-TSIG, most often to sign dynamic updates. If another mechanism can be used to authenticate updates, the vulnerability can be avoided by choosing not to enable the use of GSS-TSIG features.\n\nOn some platforms it may be possible to build a working BIND installation that is not vulnerable to CVE-2020-8625 by providing the --disable-isc-spnego command-line argument when running the ./configure script in the top level of the BIND source directory, before compiling and linking named.\n\nChoosing to configure and build BIND without the ISC SPNEGO implementation does not produce a vulnerable BIND on any platform, but on platforms where GSSAPI support in the system is lacking, building without the ISC SPNEGO implementation may result in unusable GSSAPI features (such as an inability to use GSS-TSIG-signed DDNS updates)."
          }
        ]
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2020-8625",
    "datePublished": "2021-02-17T22:40:16.090944Z",
    "dateReserved": "2020-02-05T00:00:00",
    "dateUpdated": "2024-09-16T22:40:02.277Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Action not permitted

OPENSUSE-SU-2021:0375-1

CVE-2020-8625 (GCVE-0-2020-8625)

Tags

Sightings

Nomenclature