CVE-2019-6690
Publication date 21 March 2019
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
python-gnupg 0.4.3 allows context-dependent attackers to trick gnupg to decrypt other ciphertext than intended. To perform the attack, the passphrase to gnupg must be controlled by the adversary and the ciphertext should be trusted. Related to a "CWE-20: Improper Input Validation" issue affecting the affect functionality component.
From the Ubuntu Security Team
It was discovered that python-gnupg incorrectly handled the GPG passphrase. A remote attacker could send a specially crafted passphrase that would allow them to control the output of encryption and decryption operations.
Status
Package | Ubuntu Release | Status |
---|---|---|
python-gnupg | 24.10 oracular |
Not affected
|
24.04 LTS noble |
Not affected
|
|
22.04 LTS jammy |
Vulnerable
|
|
20.04 LTS focal |
Vulnerable
|
|
18.04 LTS bionic |
Fixed 0.4.1-1ubuntu1.18.04.1
|
|
16.04 LTS xenial |
Fixed 0.3.8-2ubuntu0.1~esm1
|
|
14.04 LTS trusty |
Fixed 0.3.6-1ubuntu0.1~esm1
|
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Get Ubuntu ProSeverity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 · High |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-3964-1
- python-gnupg vulnerabilities
- 2 May 2019
- USN-4839-1
- python-gnupg vulnerabilities
- 15 March 2021
Other references
- https://github.com/stigtsp/CVE-2019-6690-python-gnupg-vulnerability
- https://github.com/vsajip/python-gnupg/commit/39eca266dd837e2ad89c94eb17b7a6f50b25e7cf#diff-88b99bb28683bd5b7e3a204826ead112
- https://github.com/vsajip/python-gnupg/commit/3003b654ca1c29b0510a54b9848571b3ad57df19#diff-88b99bb28683bd5b7e3a204826ead112
- https://www.cve.org/CVERecord?id=CVE-2019-6690