CVE-2017-16833 Gemirro Stored XSS in Gemspec "homepage" value
Attackers can inject arbitrary web script via crafted URLs in Gemirro gemspec files, potentially executing code in user browsers.
- 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-2017-16833?
CVE-2017-16833 is a medium-severity cross-site scripting vulnerability in n/a, published on 15 Nov 2017. 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
Stored cross-site scripting (XSS) vulnerability in Gemirro before 0.16.0 allows attackers to inject arbitrary web script via a crafted javascript: URL in the "homepage" value of a ".gemspec" file.
Weakness: CWE-79
Which versions are affected by CVE-2017-16833?
2 open source packages ship an affected version, including gemirro. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gemirro RubyGems | All versions | 0.16.0 |
gemirro RubyGems | All versions | 0.16.0 |
Products include Gemirro Project Gemirro.
How do I fix CVE-2017-16833?
Upgrade gemirro to 0.16.0 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2017-16833 being exploited?
There is no known exploitation of CVE-2017-16833 in the wild and no public exploit code.
Sources
Also known as GHSA-x7p2-x2j6-mwhr.