Ubuntu.comUB:CVE-2021-41991CVE-2021-41991
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.061 Low
EPSS
Percentile
93.4%
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | affects 4.2.10+ |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | strongswan | < 5.6.2-1ubuntu2.7 | UNKNOWN |
| ubuntu | 20.04 | noarch | strongswan | < 5.8.2-1ubuntu3.3 | UNKNOWN |
| ubuntu | 21.04 | noarch | strongswan | < 5.9.1-1ubuntu1.2 | UNKNOWN |
| ubuntu | 21.10 | noarch | strongswan | < 5.9.1-1ubuntu3.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | strongswan | < 5.9.1-1ubuntu3.1 | UNKNOWN |
| ubuntu | 22.10 | noarch | strongswan | < 5.9.1-1ubuntu3.1 | UNKNOWN |
| ubuntu | 23.04 | noarch | strongswan | < 5.9.1-1ubuntu3.1 | UNKNOWN |
| ubuntu | 23.10 | noarch | strongswan | < 5.9.1-1ubuntu3.1 | UNKNOWN |
| ubuntu | 14.04 | noarch | strongswan | < 5.1.2-0ubuntu2.11+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
| ubuntu | 16.04 | noarch | strongswan | < 5.3.5-1ubuntu3.8+esm1) Available with Ubuntu Pro or Ubuntu Pro (Infra-only | UNKNOWN |
Related
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.061 Low
EPSS
Percentile
93.4%