CVE-2018-0501 - Improper Verification of Cryptographic Signature

Severity

43%

Complexity

86%

Confidentiality

48%

The mirror:// method implementation in Advanced Package Tool (APT) 1.6.x before 1.6.4 and 1.7.x before 1.7.0~alpha3 mishandles gpg signature verification for the InRelease file of a fallback mirror, aka mirrorfail.

CVSS 3.0 Base Score 5.9. CVSS Attack Vector: network. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N).

CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N).

Demo Examples

Improper Verification of Cryptographic Signature

CWE-347

In the following code, a JarFile object is created from a downloaded file.


               JarFile jf = new JarFile(f);

The JAR file that was potentially downloaded from an untrusted source is created without verifying the signature (if present). An alternate constructor that accepts a boolean verify parameter should be used instead.

Overview

First reported 6 years ago

2018-08-21 00:29:00

Last updated 6 years ago

2019-01-17 18:49:00

Affected Software

Canonical Ubuntu Linux 18.04 LTS Edition

18.04

Debian Advanced Package Tool (APT) 1.7.0 Alpha 1

1.7.0

Debian Advanced Package Tool (APT) 1.7.0 Alpha 2

1.7.0

References

https://mirror.fail

Third Party Advisory

https://salsa.debian.org/apt-team/apt/commit/29658a3a74af49e2a24e17bdebb20e1612aac3ec

Patch, Third Party Advisory

https://salsa.debian.org/apt-team/apt/commit/aebd4278bacc728ab00ebe31556983e140f60e47