CVE-2021-42029 Missing authorization in SIMATIC STEP 7 (TIA Portal) V15
An attacker with direct access to the web server can escalate privileges due to improper access control in Siemens TIA Portal engineering software.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-42029?
CVE-2021-42029 is a high-severity missing authorization vulnerability in Siemens SIMATIC STEP 7 (TIA Portal) V15, published on 12 Apr 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been identified in SIMATIC STEP 7 (TIA Portal) V15 (All versions), SIMATIC STEP 7 (TIA Portal) V16 (All versions < V16 Update 5), SIMATIC STEP 7 (TIA Portal) V17 (All versions < V17 Update 2). An attacker could achieve privilege escalation on the web server of certain devices due to improper access control vulnerability in the engineering system software. The attacker needs to have direct access to the impacted web server.
Weakness: CWE-284
Which versions are affected by CVE-2021-42029?
It affects 1 product.
Products include Siemens Simatic Step 7.
How do I fix CVE-2021-42029?
No fix has been published for CVE-2021-42029 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-42029 being exploited?
There is no known exploitation of CVE-2021-42029 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC STEP 7 (TIA Portal) V15
Sources
Also known as GHSA-vp88-r9qc-vwrw.