CVE-2020-7695 HTTP Response Splitting
Attackers can inject arbitrary headers or response bodies via CRLF injection in Uvicorn, potentially leading to cache poisoning or XSS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-7695?
CVE-2020-7695 is a medium-severity vulnerability in uvicorn, published on 27 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Uvicorn before 0.11.7 is vulnerable to HTTP response splitting. CRLF sequences are not escaped in the value of HTTP headers. Attackers can exploit this to add arbitrary headers to HTTP responses, or even return an arbitrary response body, whenever crafted input is used to construct HTTP headers.
Weakness: CWE-74
Which versions are affected by CVE-2020-7695?
3 open source packages ship an affected version, including uvicorn. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
uvicorn PyPI | All versions | 0.11.7 |
uvicorn PyPI | All versions | 0.11.7 |
uvicorn PyPI | All versions | 0.11.7 |
Products include Encode Uvicorn.
How do I fix CVE-2020-7695?
Upgrade uvicorn to 0.11.7 or later.
Is CVE-2020-7695 being exploited?
There is no known exploitation of CVE-2020-7695 in the wild and no public exploit code.
Other vulnerabilities in uvicorn
Sources
Also known as DEBIAN-CVE-2020-7695, GHSA-f97h-2pfx-f59f, PYSEC-2020-151, SNYK-PYTHON-UVICORN-570471, UBUNTU-CVE-2020-7695.