CVE-2020-15128 Reliance on Cookies without validation in OctoberCMS
Attackers can bypass cookie validation by reusing encrypted values across different cookie names, potentially forcing decryption of sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-15128?
CVE-2020-15128 is a medium-severity vulnerability in Octobercms October, published on 31 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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).
Which versions are affected by CVE-2020-15128?
2 open source packages ship an affected version, including october/rain. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
october/rain Packagist | From 1.0.319 | 1.0.468 |
october/rain Packagist | From 1.0.319 | 1.0.468 |
Products include Octobercms October.
How do I fix CVE-2020-15128?
Upgrade october/rain to 1.0.468 or later.
Is CVE-2020-15128 being exploited?
There is no known exploitation of CVE-2020-15128 in the wild and no public exploit code.
Other vulnerabilities in Octobercms October
Sources
Also known as GHSA-55mm-5399-7r63.