ubuntu-cve-2021-33477
Vulnerability from osv_ubuntu
Published
2021-05-20 20:15
Modified
2026-02-12 04:56
Summary
Details

rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). A response is terminated by a newline.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "eterm",
            "binary_version": "0.9.6-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "eterm",
        "purl": "pkg:deb/ubuntu/eterm@0.9.6-4?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.6-1",
        "0.9.6-3",
        "0.9.6-4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mrxvt",
            "binary_version": "0.5.4-1.2"
          },
          {
            "binary_name": "mrxvt-cjk",
            "binary_version": "0.5.4-1.2"
          },
          {
            "binary_name": "mrxvt-common",
            "binary_version": "0.5.4-1.2"
          },
          {
            "binary_name": "mrxvt-mini",
            "binary_version": "0.5.4-1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "mrxvt",
        "purl": "pkg:deb/ubuntu/mrxvt@0.5.4-1.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.5.4-1.1",
        "0.5.4-1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rxvt",
            "binary_version": "1:2.7.10-6"
          },
          {
            "binary_name": "rxvt-ml",
            "binary_version": "1:2.7.10-6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "rxvt",
        "purl": "pkg:deb/ubuntu/rxvt@1:2.7.10-6?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:2.7.10-6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "rxvt-unicode",
            "binary_version": "9.21-1build1"
          },
          {
            "binary_name": "rxvt-unicode-256color",
            "binary_version": "9.21-1build1"
          },
          {
            "binary_name": "rxvt-unicode-lite",
            "binary_version": "9.21-1build1"
          },
          {
            "binary_name": "rxvt-unicode-ml",
            "binary_version": "9.21-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "rxvt-unicode",
        "purl": "pkg:deb/ubuntu/rxvt-unicode@9.21-1build1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.21-1",
        "9.21-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "eterm",
            "binary_version": "0.9.6-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "eterm",
        "purl": "pkg:deb/ubuntu/eterm@0.9.6-5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.6-5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aterm",
            "binary_version": "9.22-3"
          },
          {
            "binary_name": "aterm-ml",
            "binary_version": "9.22-3"
          },
          {
            "binary_name": "rxvt",
            "binary_version": "1:2.7.10-7.1+urxvt9.22-3"
          },
          {
            "binary_name": "rxvt-ml",
            "binary_version": "1:2.7.10-7.1+urxvt9.22-3"
          },
          {
            "binary_name": "rxvt-unicode",
            "binary_version": "9.22-3"
          },
          {
            "binary_name": "rxvt-unicode-256color",
            "binary_version": "9.22-3"
          },
          {
            "binary_name": "rxvt-unicode-lite",
            "binary_version": "9.22-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "rxvt-unicode",
        "purl": "pkg:deb/ubuntu/rxvt-unicode@9.22-3?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.22-1build2",
        "9.22-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "eterm",
            "binary_version": "0.9.6-6build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "eterm",
        "purl": "pkg:deb/ubuntu/eterm@0.9.6-6build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.6-6build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aterm",
            "binary_version": "9.22-6build3"
          },
          {
            "binary_name": "aterm-ml",
            "binary_version": "9.22-6build3"
          },
          {
            "binary_name": "rxvt",
            "binary_version": "1:2.7.10-7.1+urxvt9.22-6build3"
          },
          {
            "binary_name": "rxvt-ml",
            "binary_version": "1:2.7.10-7.1+urxvt9.22-6build3"
          },
          {
            "binary_name": "rxvt-unicode",
            "binary_version": "9.22-6build3"
          },
          {
            "binary_name": "rxvt-unicode-256color",
            "binary_version": "9.22-6build3"
          },
          {
            "binary_name": "rxvt-unicode-lite",
            "binary_version": "9.22-6build3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "rxvt-unicode",
        "purl": "pkg:deb/ubuntu/rxvt-unicode@9.22-6build3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.22-6build1",
        "9.22-6build2",
        "9.22-6build3"
      ]
    }
  ],
  "aliases": [],
  "details": "rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). A response is terminated by a newline.",
  "id": "UBUNTU-CVE-2021-33477",
  "modified": "2026-02-12T04:56:45Z",
  "published": "2021-05-20T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33477"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2021/05/17/1"
    },
    {
      "type": "REPORT",
      "url": "https://git.enlightenment.org/apps/eterm.git/log/"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2017/05/01/20"
    },
    {
      "type": "REPORT",
      "url": "https://sourceforge.net/projects/rxvt/files/rxvt-dev/"
    },
    {
      "type": "REPORT",
      "url": "http://cvs.schmorp.de/rxvt-unicode/src/command.C?r1=1.582\u0026r2=1.583"
    },
    {
      "type": "REPORT",
      "url": "https://packetstormsecurity.com/files/162621/rxvt-2.7.0-rxvt-unicode-9.22-Code-Execution.html"
    },
    {
      "type": "REPORT",
      "url": "https://sourceforge.net/projects/materm/files/mrxvt%20source/"
    },
    {
      "type": "REPORT",
      "url": "http://cvs.schmorp.de/rxvt-unicode/Changes?view=log"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-33477"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-33477"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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