CVE-2019-15796 — Improper Authentication in Python-apt

CWE-287 — Improper AuthenticationCWE-347 — Improper Verification of Cryptographic Signature11 documents6 sources
Severity
4.7MEDIUMNVD
EPSS
0.2%
top 61.16%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Canonical Python-aptDebian Python-aptUbuntu Python-apt
Timeline
PublishedMar 26
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 1.6 | Impact: 2.7

Affected Packages6 packages

▶CVEListV5canonical/python-apt0.8.3 — 0.8.3ubuntu7.5+5
▶PyPIcanonical/python-apt0.9.0 — 0.9.3.5ubuntu3+4
▶Debiancanonical/python-apt< 1.8.5+3
▶Ubuntucanonical/python-apt< 1.1.0~beta1ubuntu0.16.04.7+1

Patches

Patch: usn.ubuntu.com ↗Patch: usn.ubuntu.com ↗Patch: usn.ubuntu.com ↗

🔴Vulnerability Details

7
OSV
python-apt Does Not Check Hash Signature↗2022-05-24
▶
GHSA
python-apt Does Not Check Hash Signature↗2022-05-24
▶
OSV
CVE-2019-15796: Python-apt doesn't check if hashes are signed in `Version↗2020-03-26
▶
CVEList
python-apt downloads from untrusted sources↗2020-03-26
▶
OSV
python-apt vulnerabilities↗2020-01-23
▶

📋Vendor Advisories

3
Ubuntu
python-apt vulnerabilities↗2020-01-23
▶
Ubuntu
python-apt vulnerabilities↗2020-01-22
▶
Debian
CVE-2019-15796: python-apt - Python-apt doesn't check if hashes are signed in `Version.fetch_binary()` and `V...↗2019
▶
CVE-2019-15796 — Improper Authentication in Python-apt | cvebase