CVE-2021-22113 Incorrect Authorization in Spring Cloud Netflix Zuul
Attackers can bypass Sensitive Headers restrictions in Spring Cloud Netflix Zuul using specially constructed URLs if StrictHttpFirewall is disabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-22113?
CVE-2021-22113 is a medium-severity vulnerability in Spring Cloud Netflix Zuul, published on 23 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Applications using the “Sensitive Headers” functionality in Spring Cloud Netflix Zuul 2.2.6.RELEASE and below may be vulnerable to bypassing the “Sensitive Headers” restriction when executing requests with specially constructed URLs. Applications that use Spring Security's StrictHttpFirewall (enabled by default for all URLs) are not affected by the vulnerability, as they reject requests that allow bypassing.
Weakness: CWE-863
Which versions are affected by CVE-2021-22113?
2 open source packages ship an affected version, including org.springframework.cloud:spring-cloud-netflix-zuul. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework.cloud:spring-cloud-netflix-zuul Maven | All versions | 2.2.7 |
org.springframework.cloud:spring-cloud-netflix-zuul Maven | All versions | 2.2.7 |
Products include Vmware Spring Cloud Netflix Zuul.
How do I fix CVE-2021-22113?
Upgrade org.springframework.cloud:spring-cloud-netflix-zuul to 2.2.7 or later.
Is CVE-2021-22113 being exploited?
There is no known exploitation of CVE-2021-22113 in the wild and no public exploit code.
Sources
Also known as GHSA-vwpg-f6gw-rjvf.