CVE-2019-15796 python-apt downloads from untrusted sources

2019-12-1200:00:00

CWE-287

canonical

www.cve.org

4.7 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

4.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

32.5%

JSON

Python-apt doesn’t check if hashes are signed in Version.fetch_binary() and Version.fetch_source() of apt/package.py or in _fetch_archives() of apt/cache.py in version 1.9.3ubuntu2 and earlier. This allows downloads from unsigned repositories which shouldn’t be allowed and has been fixed in verisions 1.9.5, 1.9.0ubuntu1.2, 1.6.5ubuntu0.1, 1.1.0~beta1ubuntu0.16.04.7, 0.9.3.5ubuntu3+esm2, and 0.8.3ubuntu7.5.

CNA Affected

[
  {
    "product": "Python-apt",
    "vendor": "Canonical",
    "versions": [
      {
        "lessThan": "0.8.3ubuntu7.5",
        "status": "affected",
        "version": "0.8.3",
        "versionType": "custom"
      },
      {
        "lessThan": "0.9.3.5ubuntu3+esm2",
        "status": "affected",
        "version": "0.9.3.5",
        "versionType": "custom"
      },
      {
        "lessThan": "1.1.0~beta1ubuntu0.16.04.7",
        "status": "affected",
        "version": "1.1.0",
        "versionType": "custom"
      },
      {
        "lessThan": "1.6.5ubuntu0.1",
        "status": "affected",
        "version": "1.6.5",
        "versionType": "custom"
      },
      {
        "lessThan": "1.9.0ubuntu1.2",
        "status": "affected",
        "version": "1.9.0",
        "versionType": "custom"
      },
      {
        "lessThan": "1.9.5",
        "status": "affected",
        "version": "1.9.5",
        "versionType": "custom"
      }
    ]
  }
]