CVE-2020-15704 pppd arbitrary file read information disclosure vulnerability

2020-08-3123:15:14

CWE-200

canonical

www.cve.org

vulnerability

pppd

arbitrary file read

fix

modprobe_options environment variable

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

5.2

Confidence

High

EPSS

0.001

Percentile

28.9%

JSON

The modprobe child process in the ./debian/patches/load_ppp_generic_if_needed patch file incorrectly handled module loading. A local non-root attacker could exploit the MODPROBE_OPTIONS environment variable to read arbitrary root files. Fixed in 2.4.5-5ubuntu1.4, 2.4.5-5.1ubuntu2.3+esm2, 2.4.7-1+2ubuntu1.16.04.3, 2.4.7-2+2ubuntu1.3, 2.4.7-2+4.1ubuntu5.1, 2.4.7-2+4.1ubuntu6. Was ZDI-CAN-11504.

CNA Affected

[
  {
    "product": "ppp",
    "vendor": "Canonical",
    "versions": [
      {
        "changes": [
          {
            "at": "2.4.5-5.1ubuntu2.3+esm2",
            "status": "unaffected"
          }
        ],
        "lessThan": "2.4.5-5ubuntu1.4",
        "status": "affected",
        "version": "2.4.5",
        "versionType": "custom"
      },
      {
        "changes": [
          {
            "at": "2.4.7-2+2ubuntu1.3",
            "status": "unaffected"
          },
          {
            "at": "2.4.7-2+4.1ubuntu5.1",
            "status": "unaffected"
          },
          {
            "at": "2.4.7-2+4.1ubuntu6",
            "status": "unaffected"
          }
        ],
        "lessThan": "2.4.7-1+2ubuntu1.16.04.3",
        "status": "affected",
        "version": "2.4.7",
        "versionType": "custom"
      }
    ]
  }
]