Vulnerability Details : CVE-2020-15128
In OctoberCMS before version 1.0.468, encrypted cookie values were not tied to the name of the cookie the value belonged to. This meant that certain classes of attacks that took advantage of other theoretical vulnerabilities in user facing code (nothing exploitable in the core project itself) had a higher chance of succeeding. Specifically, if your usage exposed a way for users to provide unfiltered user input and have it returned to them as an encrypted cookie (ex. storing a user provided search query in a cookie) they could then use the generated cookie in place of other more tightly controlled cookies; or if your usage exposed the plaintext version of an encrypted cookie at any point to the user they could theoretically provide encrypted content from your application back to it as an encrypted cookie and force the framework to decrypt it for them. Issue has been fixed in build 468 (v1.0.468).
Products affected by CVE-2020-15128
- cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-15128
0.11%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 31 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-15128
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
3.5
|
LOW | AV:N/AC:M/Au:S/C:N/I:P/A:N |
6.8
|
2.9
|
NIST | |
6.3
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N |
1.8
|
4.0
|
NIST | |
6.1
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N |
1.6
|
4.0
|
GitHub, Inc. |
CWE ids for CVE-2020-15128
-
The product uses a broken or risky cryptographic algorithm or protocol.Assigned by: nvd@nist.gov (Primary)
-
The product relies on the existence or values of cookies when performing security-critical operations, but it does not properly ensure that the setting is valid for the associated user.Assigned by: security-advisories@github.com (Secondary)
References for CVE-2020-15128
-
https://github.com/octobercms/library/commit/28310d4fb336a1741b39498f4474497644a6875c
Improvements to cookie value validation (#508) · octobercms/library@28310d4 · GitHubPatch;Third Party Advisory
-
https://github.com/octobercms/library/pull/508
Improvements to cookie value validation by LukeTowers · Pull Request #508 · octobercms/library · GitHubPatch;Third Party Advisory
-
https://github.com/octobercms/october/security/advisories/GHSA-55mm-5399-7r63
Encrypted cookie values are not tied to the cookie name · Advisory · octobercms/october · GitHubThird Party Advisory
Jump to