ubuntu-cve-2021-38165
Vulnerability from osv_ubuntu
Published
2021-08-07 18:15
Modified
2025-09-08 16:47
Summary
Details

Lynx through 2.8.9 mishandles the userinfo subcomponent of a URI, which allows remote attackers to discover cleartext credentials because they may appear in SNI data.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "lynx",
            "binary_version": "2.8.9dev8-4ubuntu1+esm2"
          },
          {
            "binary_name": "lynx-common",
            "binary_version": "2.8.9dev8-4ubuntu1+esm2"
          },
          {
            "binary_name": "lynx-cur",
            "binary_version": "2.8.9dev8-4ubuntu1+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "lynx",
        "purl": "pkg:deb/ubuntu/lynx@2.8.9dev8-4ubuntu1+esm2?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.8.9dev8-4ubuntu1+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.8.9dev8-4ubuntu1",
        "2.8.9dev8-4ubuntu1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "lynx",
            "binary_version": "2.8.9dev16-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "lynx-common",
            "binary_version": "2.8.9dev16-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "lynx",
        "purl": "pkg:deb/ubuntu/lynx@2.8.9dev16-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.8.9dev16-3ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.8.9dev16-1",
        "2.8.9dev16-2",
        "2.8.9dev16-3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "lynx",
            "binary_version": "2.9.0dev.5-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "lynx-common",
            "binary_version": "2.9.0dev.5-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "lynx",
        "purl": "pkg:deb/ubuntu/lynx@2.9.0dev.5-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.9.0dev.5-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.9.0dev.4-1",
        "2.9.0dev.5-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Lynx through 2.8.9 mishandles the userinfo subcomponent of a URI, which allows remote attackers to discover cleartext credentials because they may appear in SNI data.",
  "id": "UBUNTU-CVE-2021-38165",
  "modified": "2025-09-08T16:47:16Z",
  "published": "2021-08-07T18:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-38165"
    },
    {
      "type": "REPORT",
      "url": "https://lists.nongnu.org/archive/html/lynx-dev/2021-08/msg00002.html"
    },
    {
      "type": "REPORT",
      "url": "https://lynx.invisible-island.net/current/CHANGES.html#v2.9.0dev.9"
    },
    {
      "type": "REPORT",
      "url": "https://invisible-mirror.net/archives/lynx/patches/lynx2.9.0dev.9.patch.gz"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2021/08/07/1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/w3c/libwww/blob/f010b4cc58d32f34b162f0084fe093f7097a61f0/Library/src/HTParse.c#L118"
    },
    {
      "type": "REPORT",
      "url": "https://lynx.invisible-island.net/current/CHANGES.html"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.debian.org/991971"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2021/08/07/11"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2021/08/07/9"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4800-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-38165"
    }
  ],
  "related": [
    "USN-4800-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-38165"
  ]
}



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