CVE-2018-20857 samlr XML nodes comment attack
Attackers can exploit XML comment injection in Zendesk Samlr to bypass validation or access sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-20857?
CVE-2018-20857 is a high-severity vulnerability in n/a, published on 26 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Zendesk Samlr before 2.6.2 allows an XML nodes comment attack such as a name_id node with [email protected] followed by <!---->. and then the attacker's domain name.
Weakness: CWE-20
Which versions are affected by CVE-2018-20857?
2 open source packages ship an affected version, including samlr. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
samlr RubyGems | All versions | 2.6.2 |
samlr RubyGems | All versions | 2.6.2 |
Products include Zendesk Samlr.
How do I fix CVE-2018-20857?
Upgrade samlr to 2.6.2 or later.
Is CVE-2018-20857 being exploited?
There is no known exploitation of CVE-2018-20857 in the wild and no public exploit code.
Sources
Also known as GHSA-qpxp-5j56-gg3x.