CVE-2020-36167 Path traversal in n/a
A low-privileged user can create a malicious OpenSSL configuration file to achieve arbitrary code execution as SYSTEM during service startup.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-36167?
CVE-2020-36167 is a critical path traversal vulnerability in n/a, published on 6 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in the server in Veritas Backup Exec through 16.2, 20.6 before hotfix 298543, and 21.1 before hotfix 657517. On start-up, it loads the OpenSSL library from the Installation folder. This library in turn attempts to load the /usr/local/ssl/openssl.cnf configuration file, which may not exist. On Windows systems, this path could translate to <drive>:\usr\local\ssl\openssl.cnf. A low privileged user can create a :\usr\local\ssl\openssl.cnf configuration file to load a malicious OpenSSL engine, resulting in arbitrary code execution as SYSTEM when the service starts. This gives the attacker administrator access on the system, allowing the attacker (by default) to access all data, access all installed applications, etc. If the system is also an Active Directory domain controller, then this can affect the entire domain.
Weakness: CWE-434
Which versions are affected by CVE-2020-36167?
It affects 1 product.
Products include Veritas Backup Exec.
How do I fix CVE-2020-36167?
No fix has been published for CVE-2020-36167 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2020-36167 being exploited?
There is no known exploitation of CVE-2020-36167 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-xwmw-hpfw-6rrp.