Vulnerability Details : CVE-2021-3311
Potential exploit
An issue was discovered in October through build 471. It reactivates an old session ID (which had been invalid after a logout) once a new login occurs. NOTE: this violates the intended Auth/Manager.php authentication behavior but, admittedly, is only relevant if an old session ID is known to an attacker.
Products affected by CVE-2021-3311
- cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3311
1.52%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 80 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3311
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
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-2021-3311
-
According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-3311
-
https://anisiosantos.me/october-cms-token-reactivation
CVE: 2021-3311 October CMS Token ReactivationExploit;Third Party Advisory
-
https://octobercms.com/forum/chan/announcements
News / Announcements - October CMSVendor Advisory
-
https://github.com/octobercms/library/commit/642f597489e6f644d4bd9a0c267e864cabead024
Invalidate the session ID to prevent reuse · octobercms/library@642f597 · GitHubPatch;Third Party Advisory
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