CVE-2020-26834 Auth bypass in SAP HANA Database
Attackers can manipulate SAML bearer tokens to authenticate as other users in SAP HANA Database due to improper username validation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-26834?
CVE-2020-26834 is a medium-severity authentication bypass vulnerability in SAP HANA Database, published on 9 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued.
Weakness: CWE-287
Which versions are affected by CVE-2020-26834?
It affects 1 product.
Products include Sap Hana Database.
How do I fix CVE-2020-26834?
No fix has been published for CVE-2020-26834 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-26834 being exploited?
There is no known exploitation of CVE-2020-26834 in the wild and no public exploit code.
Other vulnerabilities in SAP HANA Database
- CVE-2018-2424 Cross-site scripting in SAP HANA Database
- CVE-2026-0492 Privilege escalation vulnerability in SAP HANA database
- CVE-2019-0350 Denial of service in SAP HANA Database
- CVE-2021-21474 Weak cryptography in SAP HANA Database
- CVE-2017-16687 Information disclosure in SAP HANA extended application services
Sources
Also known as GHSA-xwh3-6m65-fmmj.