Vulnerability-Lookup

CNVD-2016-02877

Vulnerability from cnvd - Published: 2016-05-10

Title

libpam-sshauth本地提权漏洞

Description

libpam-sshauth是一个可通过ssh方式连接到远程服务器对本地计算机上的用户进行身份验证的PAM模块。 libpam-sshauth存在编程错误，允许本地攻击者可利用该漏洞获取root权限。

Severity

高

Patch Name

libpam-sshauth本地提权漏洞的补丁

Patch Description

libpam-sshauth是一个可通过ssh方式连接到远程服务器对本地计算机上的用户进行身份验证的PAM模块。 libpam-sshauth存在编程错误，允许本地攻击者可利用该漏洞获取root权限。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

用户可参考如下厂商提供的安全补丁以修复该漏洞： http://www.linux-pam.org/Linux-PAM-html/sag-pam_succeed_if.html

Reference

http://www.openwall.com/lists/oss-security/2016/05/01/3

Impacted products

Name
libpam-sshauth libpam-sshauth

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2016-4422"
    }
  },
  "description": "libpam-sshauth\u662f\u4e00\u4e2a\u53ef\u901a\u8fc7ssh\u65b9\u5f0f\u8fde\u63a5\u5230\u8fdc\u7a0b\u670d\u52a1\u5668\u5bf9\u672c\u5730\u8ba1\u7b97\u673a\u4e0a\u7684\u7528\u6237\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u7684PAM\u6a21\u5757\u3002\r\n\r\nlibpam-sshauth\u5b58\u5728\u7f16\u7a0b\u9519\u8bef\uff0c\u5141\u8bb8\u672c\u5730\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6root\u6743\u9650\u3002",
  "discovererName": "unknown",
  "formalWay": "\u7528\u6237\u53ef\u53c2\u8003\u5982\u4e0b\u5382\u5546\u63d0\u4f9b\u7684\u5b89\u5168\u8865\u4e01\u4ee5\u4fee\u590d\u8be5\u6f0f\u6d1e\uff1a\r\nhttp://www.linux-pam.org/Linux-PAM-html/sag-pam_succeed_if.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2016-02877",
  "openTime": "2016-05-10",
  "patchDescription": "libpam-sshauth\u662f\u4e00\u4e2a\u53ef\u901a\u8fc7ssh\u65b9\u5f0f\u8fde\u63a5\u5230\u8fdc\u7a0b\u670d\u52a1\u5668\u5bf9\u672c\u5730\u8ba1\u7b97\u673a\u4e0a\u7684\u7528\u6237\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u7684PAM\u6a21\u5757\u3002\r\n\r\nlibpam-sshauth\u5b58\u5728\u7f16\u7a0b\u9519\u8bef\uff0c\u5141\u8bb8\u672c\u5730\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6root\u6743\u9650\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "libpam-sshauth\u672c\u5730\u63d0\u6743\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "libpam-sshauth libpam-sshauth"
  },
  "referenceLink": "http://www.openwall.com/lists/oss-security/2016/05/01/3",
  "serverity": "\u9ad8",
  "submitTime": "2016-05-07",
  "title": "libpam-sshauth\u672c\u5730\u63d0\u6743\u6f0f\u6d1e"
}

CVE-2016-4422 (GCVE-0-2016-4422)

Vulnerability from cvelistv5 – Published: 2016-05-06 17:00 – Updated: 2024-08-06 00:32

Summary

The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account.

Severity

No CVSS data available.

CWE

Assigner

debian mitre root

References

2 references

URL	Tags
http://www.debian.org/security/2016/dsa-3567	vendor-advisoryx_refsource_DEBIAN
https://bazaar.launchpad.net/~ltsp-upstream/ltsp/…	x_refsource_CONFIRM

Date Public

2016-05-04 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-06T00:32:24.660Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "DSA-3567",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "http://www.debian.org/security/2016/dsa-3567"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bazaar.launchpad.net/~ltsp-upstream/ltsp/libpam-sshauth/revision/114#src/pam_sshauth.c"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2016-05-04T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2016-05-06T16:57:01.000Z",
        "orgId": "79363d38-fa19-49d1-9214-5f28da3f3ac5",
        "shortName": "debian"
      },
      "references": [
        {
          "name": "DSA-3567",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "http://www.debian.org/security/2016/dsa-3567"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bazaar.launchpad.net/~ltsp-upstream/ltsp/libpam-sshauth/revision/114#src/pam_sshauth.c"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@debian.org",
          "ID": "CVE-2016-4422",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The pam_sm_authenticate function in pam_sshauth.c in libpam-sshauth might allow context-dependent attackers to bypass authentication or gain privileges via a system user account."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "DSA-3567",
              "refsource": "DEBIAN",
              "url": "http://www.debian.org/security/2016/dsa-3567"
            },
            {
              "name": "https://bazaar.launchpad.net/~ltsp-upstream/ltsp/libpam-sshauth/revision/114#src/pam_sshauth.c",
              "refsource": "CONFIRM",
              "url": "https://bazaar.launchpad.net/~ltsp-upstream/ltsp/libpam-sshauth/revision/114#src/pam_sshauth.c"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "79363d38-fa19-49d1-9214-5f28da3f3ac5",
    "assignerShortName": "debian",
    "cveId": "CVE-2016-4422",
    "datePublished": "2016-05-06T17:00:00.000Z",
    "dateReserved": "2016-05-01T00:00:00.000Z",
    "dateUpdated": "2024-08-06T00:32:24.660Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CNVD-2016-02877

CVE-2016-4422 (GCVE-0-2016-4422)

Tags

Sightings

Nomenclature

Related by attack behaviour