GSD-2021-4034
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
A local privilege escalation vulnerability was found on polkit's pkexec utility. The pkexec application is a setuid tool designed to allow unprivileged users to run commands as privileged users according predefined policies. The current version of pkexec doesn't handle the calling parameters count correctly and ends trying to execute environment variables as commands. An attacker can leverage this by crafting environment variables in such a way it'll induce pkexec to execute arbitrary code. When successfully executed the attack can cause a local privilege escalation given unprivileged users administrative rights on the target machine.
Aliases
Aliases
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"url": "https://gitlab.freedesktop.org/polkit/polkit/-/commit/a2bf5c9c83b6ae46cbd5c779d3055bff81ded683"
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{
"name": "http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html",
"refsource": "MISC",
"tags": [
"Exploit",
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/166196/Polkit-pkexec-Local-Privilege-Escalation.html"
},
{
"name": "http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html",
"refsource": "MISC",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://packetstormsecurity.com/files/166200/Polkit-pkexec-Privilege-Escalation.html"
},
{
"name": "https://www.suse.com/support/kb/doc/?id=000020564",
"refsource": "MISC",
"tags": [
"Third Party Advisory"
],
"url": "https://www.suse.com/support/kb/doc/?id=000020564"
},
{
"name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
"refsource": "MISC",
"tags": [
"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
],
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-330556.pdf"
},
{
"name": "https://www.starwindsoftware.com/security/sw-20220818-0001/",
"refsource": "MISC",
"tags": [
"Third Party Advisory"
],
"url": "https://www.starwindsoftware.com/security/sw-20220818-0001/"
},
{
"name": "https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/",
"refsource": "MISC",
"tags": [],
"url": "https://www.secpod.com/blog/local-privilege-escalation-vulnerability-in-major-linux-distributions-cve-2021-4034/"
}
]
}
},
"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.2,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 10.0,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "HIGH",
"userInteractionRequired": false
},
"baseMetricV3": {
"cvssV3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
},
"lastModifiedDate": "2023-10-18T01:15Z",
"publishedDate": "2022-01-28T20:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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