CVE-2019-14855
Publication date 20 March 2020
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.
Status
Package | Ubuntu Release | Status |
---|---|---|
gnupg | 24.04 LTS noble | Not in release |
22.04 LTS jammy | Not in release | |
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial |
Vulnerable, fix deferred
|
|
14.04 LTS trusty |
Vulnerable, fix deferred
|
|
gnupg1 | 24.04 LTS noble |
Needs evaluation
|
22.04 LTS jammy |
Needs evaluation
|
|
20.04 LTS focal |
Needs evaluation
|
|
18.04 LTS bionic |
Needs evaluation
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
gnupg2 | 24.04 LTS noble |
Not affected
|
22.04 LTS jammy |
Not affected
|
|
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic |
Fixed 2.2.4-1ubuntu1.3
|
|
16.04 LTS xenial | Ignored change too intrusive | |
14.04 LTS trusty | Not in release |
Notes
mdeslaur
in master, gnupg disables SHA-1 signatures completely. In the 2.2 branch, it disables SHA-1 signatures after a certain date only.
rodrigo-zaiden
As of 2022-03-22 there is no upstream patch available for gnupg 1.4 series. Backporting from 2.2 would be too risky.
Patch details
Package | Patch details |
---|---|
gnupg2 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 · High |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-4516-1
- GnuPG vulnerability
- 17 September 2020