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Medium

Security advisory

Type: advisorySources: OSVCVE: CVE-2016-10011

authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2016-10011
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 09:03 UTC · Revision 1

Source evidence

CVE-2016-10011

core-osv · Original source

Published 5 Jan 2017, 02:59 UTC

authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.

osv:CVE-2016-10011
Complete source record
{
  "id": "5e75786d8f355037d8082be2a6bd1436027eae7eb4685159a9fa223c2ade8586",
  "url": "https://osv.dev/vulnerability/CVE-2016-10011",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-10011",
    "summary": "authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.",
    "evidence": "osv:CVE-2016-10011",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2016-10011",
      "aliases": [
        "CVE-2016-10011"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openbsd/src",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ac8147a06ed2e2403fb6b9a0c03e618a9333c0e9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "ac8147a06ed2e2403fb6b9a0c03e618a9333c0e9"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-10011.json",
            "vanir_signatures": [
              {
                "id": "CVE-2016-10011-0f8d3ee9",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
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                  ]
                },
                "source": "https://github.com/openbsd/src/commit/ac8147a06ed2e2403fb6b9a0c03e618a9333c0e9",
                "target": {
                  "file": "usr.bin/ssh/authfile.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2016-10011-c83da3a4",
                "digest": {
                  "length": 886,
                  "function_hash": "131967150470127632179863844496832158061"
                },
                "source": "https://github.com/openbsd/src/commit/ac8147a06ed2e2403fb6b9a0c03e618a9333c0e9",
                "target": {
                  "file": "usr.bin/ssh/authfile.c",
                  "function": "sshkey_load_file"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-24T14:04:11Z"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/openssh/openssh-portable",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "99522ba7ec6963a05c04a156bf20e3ba3605987c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "7.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "V_7_3_P1",
            "V_7_2_P1",
            "V_7_1_P1",
            "V_7_0_P1",
            "V_6_9_P1",
            "V_6_8_P1",
            "V_6_6_P1",
            "V_6_5_P1",
            "V_6_2_P1",
            "V_6_1_P1",
            "V_6_0_P1",
            "V_5_7_P1",
            "V_5_5_P1",
            "V_5_2_P1",
            "V_5_1_P1",
            "V_5_0_P1",
            "V_4_2_P1",
            "V_3_9_P1",
            "V_3_8_P1",
            "AFTER_KRB5_GSSAPI_MERGE",
            "BEFORE_KRB5_GSSAPI_MERGE",
            "POST_KRB4_REMOVAL",
            "PRE_KRB4_REMOVAL",
            "AFTER_FREEBSD_PAM_MERGE",
            "BEFORE_FREEBSD_PAM_MERGE",
            "V_3_6_1_P1",
            "V_3_4_P1",
            "V_3_2_2_P1",
            "PRE_SW_KRBV",
            "V_3_1_P1",
            "V_3_0_1_P1",
            "V_3_0_P1",
            "V_2_5_2_P1",
            "V_2_5_1_P2",
            "V_2_5_1_P1",
            "V_2_5_0_P1",
            "PRE-REORDER",
            "V_2_3_0_P1",
            "PRE_CYGWIN_MERGE",
            "V_2_2_0_P1",
            "V_2_1_1_P4",
            "V_2_1_1_P3",
            "ABOUT_TO_ADD_INET_ATON",
            "V_2_1_1_P2",
            "V_2_1_1_P1",
            "PRE_NEW_LOGIN_CODE",
            "V_2_1_0_P3",
            "V_2_1_0_P2",
            "V_2_1_0_P1",
            "V_2_1_0",
            "V_2_0_0_BETA2",
            "V_2_0_0_BETA1",
            "V_2_0_0_TEST1",
            "V_1_2_3_TEST3",
            "V_1_2_3_TEST2",
            "V_1_2_3_TEST1",
            "V_1_2_3",
            "V_1_2_3_PRE5",
            "V_1_2_3_PRE4",
            "V_1_2_3_PRE3",
            "V_1_2_3_PRE2",
            "V_1_2_3_PRE1",
            "V_1_2_2_P1",
            "V_1_2_2",
            "V_1_2_2_PRE29",
            "V_1_2_2_PRE28",
            "V_1_2_1_PRE27",
            "V_1_2_1_PRE26",
            "PRE_IPV6",
            "V_1_2_1_PRE25",
            "V_1_2_1_PRE24",
            "V_1_2_1_PRE23",
            "V_1_2_1_PRE22",
            "PRE_FIXPATHS_INTEGRATION",
            "V_1_2_1_PRE21",
            "V_1_2_1_PRE20",
            "V_1_2_1_PRE19",
            "PRE_HPUX_INTEGRATION",
            "V_1_2_1_PRE18",
            "V_1_2PRE17",
            "V_1_2_PRE16",
            "V_1_2_PRE15",
            "V_1_2_PRE14",
            "V_1_2_PRE13",
            "V_1_2_PRE12",
            "V_1_2_PRE11",
            "V_1_2_PRE10",
            "V_1_2_PRE9",
            "V_1_2_PRE8",
            "V_1_2_PRE7",
            "V_1_2_PRE6",
            "V_1_2_PRE5",
            "V_1_2_PRE4",
            "PRE_DAN_PATCH_MERGE"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-10011.json"
          }
        }
      ],
      "modified": "2026-10-24T14:04:11.922656152Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-676336.pdf",
        "https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html",
        "https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03818en_us",
        "https://www.openssh.com/txt/release-7.4",
        "https://access.redhat.com/errata/RHSA-2017:2029",
        "https://security.netapp.com/advisory/ntap-20171130-0002/",
        "https://github.com/openbsd/src/commit/ac8147a06ed2e2403fb6b9a0c03e618a9333c0e9"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2016-10011",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 442912,
  "published_at": "2017-01-05T02:59:03.12+00:00"
}