Vulnerability Details : CVE-2021-27771
User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service. When interacting in a normal matter with the Sametime chat application, users hold a cookie containing their session ID (SID). This value is also used when sending chat messages, receiving notifications and/or transferring files.
Vulnerability category: Directory traversalDenial of service
Products affected by CVE-2021-27771
- cpe:2.3:a:hcltech:sametime:11.6:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27771
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 33 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27771
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:P |
8.0
|
6.4
|
NIST | |
|
7.6
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H |
2.8
|
4.7
|
NIST | |
|
8.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H |
2.3
|
5.3
|
HCL Software |
CWE ids for CVE-2021-27771
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by: psirt@hcl.com (Secondary)
-
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.Assigned by:
- nvd@nist.gov (Primary)
- psirt@hcl.com (Secondary)
References for CVE-2021-27771
-
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097430
Security Bulletin: Multiple security fixes available for HCL Sametime Proxy and Web chat clientVendor Advisory
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