Vulnerabilities in pkg:pypi/PyInstaller

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7fcj-pq9j-wh2r",
  "modified" : "2024-10-23T15:54:56Z",
  "published" : "2020-01-16T22:18:27Z",
  "aliases" : [ "CVE-2019-16784" ],
  "summary" : "Local Privilege Escalation in PyInstaller",
  "details" : "### Impact\n\nLocal Privilege Escalation in all Windows software frozen by PyInstaller in \"onefile\" mode.\n\nThe vulnerability is present only on Windows and in this particular case: If a **software frozen by PyInstaller in \"onefile\" mode** is launched by a (privileged) user who has **his/her \"TempPath\" resolving to a world writable directory**. This is the case e.g. if the software is launched as a service or as a scheduled task using a system account (in which case TempPath will default to C:\\Windows\\Temp).\n\nIn order to be exploitable the software has to be (re)started after the attacker has launched the exploit program. So for a service launched at startup, a service restart is needed (e.g. after a crash or an upgrade).\n\nWhile PyInstaller itself was not vulnerable, all Windows software frozen by PyInstaller in \"onefile\" mode is vulnerable.\n\nCVSSv3 score 7.0 (High)\nCVSSv3 vector CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\n\nAffected\n- all Windows software frozen by PyInstaller in \"onefile\" mode\n\nNo affected\n- PyInstaller itself (except if frozen by PyInstaller in \"onefile\" mode on Windows)\n- software frozen in \"one*dir*\" mode\n- other platforms (GNU/Linux, OS X, BSD, etc.)\n\n### Patches\nThe problem is patched in commits 42a67148b3bdf9211fda8499fdc5b63acdd7e6cc (fixed code) and be948cf0954707671aa499da17b10c86b6fa5e5c (recompiled bootloaders). Users should upgrade to PyInstaller version 3.6 and rebuild their software.\n\n### Workarounds\nThere is no known workaround. Users using PyInstaller to freeze their Windows software using \"onefile\" mode should upgrade PyInstaller and rebuild their software.\n\n### Credits\nThis vulnerability was discovered and reported by Farid AYOUJIL (@faridtsl), David HA, Florent LE NIGER and Yann GASCUEL (@lnv42) from Alter Solutions (@AlterSolutions) and fixed in collaboration with\nHartmut Goebel (@htgoebel, maintainer of PyInstaller).\n\n### Funding Development\n\nPyInstaller is in urgent need of funding to make future security fixes happen, see <https://github.com/pyinstaller/pyinstaller/issues/4404> for details.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "PyInstaller"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pyinstaller/pyinstaller/security/advisories/GHSA-7fcj-pq9j-wh2r"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-16784"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pyinstaller/pyinstaller/commit/42a67148b3bdf9211fda8499fdc5b63acdd7e6cc"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pyinstaller/pyinstaller/commit/be948cf0954707671aa499da17b10c86b6fa5e5c"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pyinstaller/pyinstaller"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/pyinstaller/PYSEC-2020-175.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-250" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-01-14T20:09:51Z",
    "nvd_published_at" : null
  }
}