Vulnerability Details : CVE-2020-5290
In RedpwnCTF before version 2.3, there is a session fixation vulnerability in exploitable through the `#token=$ssid` hash when making a request to the `/verify` endpoint. An attacker team could potentially steal flags by, for example, exploiting a stored XSS payload in a CTF challenge so that victim teams who solve the challenge are unknowingly (and against their will) signed into the attacker team's account. Then, the attacker can gain points / value off the backs of the victims. This is patched in version 2.3.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2020-5290
- cpe:2.3:a:ctfd:rctf:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-5290
0.14%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 49 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-5290
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
2.8
|
3.6
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N |
1.3
|
4.7
|
GitHub, Inc. |
CWE ids for CVE-2020-5290
-
Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)
References for CVE-2020-5290
-
https://github.com/redpwn/rctf/issues/147
Session fixation vulnerability in /verify · Issue #147 · redpwn/rCTF · GitHubExploit;Third Party Advisory
-
https://github.com/redpwn/rctf/security/advisories/GHSA-p5fh-2vhw-fvpq
Session Fixation in rCTF <2.3 · Advisory · redpwn/rCTF · GitHubExploit;Third Party Advisory
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