CVE-2023-28628 `authority-regex` returns the wrong authority in lambdaisland/uri
Attackers can craft URLs that bypass host restrictions by exploiting incorrect authority parsing in the lambdaisland/uri library.
- 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-2023-28628?
CVE-2023-28628 is a medium-severity vulnerability in lambdaisland uri, published on 27 Mar 2023. 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
lambdaisland/uri is a pure Clojure/ClojureScript URI library. In versions prior to 1.14.120 `authority-regex` allows an attacker to send malicious URLs to be parsed by the `lambdaisland/uri` and return the wrong authority. This issue is similar to but distinct from CVE-2020-8910. The regex in question doesn't handle the backslash (`\`) character in the username correctly, leading to a wrong output. ex. a payload of `https://example.com\\@google.com` would return that the host is `google.com`, but the correct host should be `example.com`. Given that the library returns the wrong authority this may be abused to bypass host restrictions depending on how the library is used in an application. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Which versions are affected by CVE-2023-28628?
2 open source packages ship an affected version, including lambdaisland:uri. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
lambdaisland:uri Maven | All versions | 1.14.120 |
lambdaisland:uri Maven | All versions | 1.14.120 |
Products include Lambdaisland Uri.
How do I fix CVE-2023-28628?
Upgrade lambdaisland:uri to 1.14.120 or later.
Is CVE-2023-28628 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-28628 exists.
Sources
Also known as DEBIAN-CVE-2023-28628, GHSA-cp4w-6x4w-v2h5, UBUNTU-CVE-2023-28628, USN-8151-1.