CVE-2020-15702 TOCTOU in apport

2020-08-0622:50:22

CWE-367

canonical

www.cve.org

toctou

apport

privilege escalation

pid recycling

zdi-can-11234

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

7.1

Confidence

High

EPSS

0.001

Percentile

28.9%

JSON

TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.

CNA Affected

[
  {
    "product": "apport",
    "vendor": "Canonical",
    "versions": [
      {
        "lessThan": "2.20.1-0ubuntu2.24",
        "status": "affected",
        "version": "2.20.1",
        "versionType": "custom"
      },
      {
        "lessThan": "2.20.9-0ubuntu7.16",
        "status": "affected",
        "version": "2.20.9",
        "versionType": "custom"
      },
      {
        "lessThan": "2.20.11-0ubuntu27.6",
        "status": "affected",
        "version": "2.20.11",
        "versionType": "custom"
      }
    ]
  }
]