Vulnerability Details : CVE-2021-43042
An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. A buffer overflow existed in the vaultServer component. This was exploitable by a remote unauthenticated attacker.
Vulnerability category: Overflow
Products affected by CVE-2021-43042
- cpe:2.3:a:kaseya:unitrends_backup:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-43042
1.62%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 88 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-43042
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2021-43042
-
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-43042
-
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-1
Exploiting Kaseya Unitrends Backup Appliance – Part 1 - CyberOne SecurityExploit;Third Party Advisory
-
https://helpdesk.kaseya.com/hc/en-gb/articles/4412762258961
Security checkVendor Advisory
-
https://www.cyberonesecurity.com/blog/exploiting-kaseya-unitrends-backup-appliance-part-2
Exploiting Kaseya Unitrends Backup Appliance – Part 2 - CyberOne SecurityExploit;Third Party Advisory
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