CVE-2019-15796

python-apt downloads from untrusted sources

MEDIUM

4.7

CVSS Score

Published: March 26, 2020 at 01:00 PM UTC

Updated: June 17, 2026 at 02:21 AM UTC

3 products affected across 3 vendorsPython AptPython AptUbuntu Linux

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Severity

MEDIUM4.7

Exploit prediction

EPSS 0.5%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Python Apt · Debian

95%

1.8.4

canonical-ubuntu-linux (environment)

Python Apt · Ubuntu

95%

v < 1.9.50.8.3 ≤ v < 0.8.3ubuntu7.50.9.3.5 ≤ v < 0.9.3.5ubuntu3+esm21.1.0 ≤ v < 1.1.0~beta1ubuntu0.16.04.71.6.5 ≤ v < 1.6.5ubuntu0.11.9.0 ≤ v < 1.9.0ubuntu1.20.8.0 ubuntu9 0.8.1 ubuntu1 0.8.3 0.8.3 ubuntu1 0.8.3 ubuntu2 0.8.3 ubuntu3 0.8.3 ubuntu4 0.8.3 ubuntu5 0.8.3 ubuntu6 0.8.3 ubuntu7 0.8.3 ubuntu7.1 0.8.3 ubuntu7.2 0.8.3 ubuntu7.3 0.8.9.1 0.8.9.1 ubuntu1 0.9.0 0.9.1 0.9.1 build1 0.9.1 build2 0.9.1 ubuntu1 0.9.3.1 0.9.3.2 0.9.3.2 ubuntu1 0.9.3.2 ubuntu2 0.9.3.3 0.9.3.3 ubuntu1 0.9.3.4 0.9.3.4 build1 0.9.3.5 0.9.3.5 ubuntu1 0.9.3.5 ubuntu2 0.9.3.5 ubuntu3 1.0.1 build1 1.0.1 ubuntu1 1.0.1 ubuntu2 1.1.0 1.1.0 beta1 1.1.0 beta1build1 1.1.0 beta1ubuntu0.16.04.1 1.1.0 beta1ubuntu0.16.04.2 1.1.0 beta1ubuntu0.16.04.3 1.1.0 beta1ubuntu0.16.04.4 1.1.0 beta1ubuntu0.16.04.5 1.4.0 1.4.0 beta3build2 1.4.0 beta3ubuntu1 1.6.0 1.6.0 rc1 1.6.0 rc2ubuntu1 1.6.0 rc2ubuntu2 1.6.0 rc3 1.6.1 1.6.2 1.6.3 1.6.3 ubuntu1 1.6.4 1.6.5 1.7.0 1.8.0 1.8.0 alpha0~ubuntu1 1.8.0 alpha0~ubuntu2 1.8.1 1.8.2 1.8.3 1.8.4 1.9.0 1.9.0 alpha0~ubuntu1 1.9.0 alpha0~ubuntu2 1.9.0 ubuntu1

Affected range stops below 0.8.3ubuntu7.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 0.9.3.5ubuntu3+esm2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.1.0~beta1ubuntu0.16.04.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.6.5ubuntu0.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.9.0ubuntu1.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.9.5, so it looks safe — our inference, not a vendor statement

canonical-ubuntu-linux (environment)

Ubuntu Linux · Canonicalrubygemsdevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisoryx_refsource_UBUNTUPatchThird Party Advisory

Source: [email protected]

https://usn.ubuntu.com/4247-1/

Vendor Advisoryx_refsource_UBUNTUPatchThird Party Advisory

Source: [email protected]

https://usn.ubuntu.com/4247-3/

CVSS

4.7MEDIUMcanonical

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-287CWE-347

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