CVE-2021-41991
Publication date 18 October 2021
Last updated 24 July 2024
Ubuntu priority
The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| strongswan | 24.04 LTS noble |
Fixed 5.9.1-1ubuntu3.1
|
| 22.04 LTS jammy |
Fixed 5.9.1-1ubuntu3.1
|
|
| 20.04 LTS focal |
Fixed 5.8.2-1ubuntu3.3
|
|
| 18.04 LTS bionic |
Fixed 5.6.2-1ubuntu2.7
|
|
| 16.04 LTS xenial |
Fixed 5.3.5-1ubuntu3.8+esm1
|
|
| 14.04 LTS trusty |
Fixed 5.1.2-0ubuntu2.11+esm1
|
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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 | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-5111-1
- strongSwan vulnerabilities
- 19 October 2021
- USN-5111-2
- strongSwan vulnerability
- 19 October 2021