CVE-2021-1145 Cisco StarOS for Cisco ASR 5000 Series Routers Arbitrary File Read Vulnerability
An authenticated attacker can read arbitrary files on Cisco ASR 5000 routers via crafted SFTP commands exploiting insecure symbolic link handling.
- 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-2021-1145?
CVE-2021-1145 is a medium-severity path traversal vulnerability in Cisco ASR 5000 Series Software, published on 13 Jan 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in the Secure FTP (SFTP) of Cisco StarOS for Cisco ASR 5000 Series Routers could allow an authenticated, remote attacker to read arbitrary files on an affected device. To exploit this vulnerability, the attacker would need to have valid credentials on the affected device. The vulnerability is due to insecure handling of symbolic links. An attacker could exploit this vulnerability by sending a crafted SFTP command to an affected device. A successful exploit could allow the attacker to read arbitrary files on the affected device.
Which versions are affected by CVE-2021-1145?
It affects 1 product.
Products include Cisco Staros.
How do I fix CVE-2021-1145?
No fix has been published for CVE-2021-1145 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-2021-1145 being exploited?
There is no known exploitation of CVE-2021-1145 in the wild and no public exploit code.
Other vulnerabilities in Cisco ASR 5000 Series Software
- CVE-2023-20046 Auth bypass in Cisco ASR 5000 Series Software
- CVE-2019-1869 Cisco StarOS Denial of Service Vulnerability
- CVE-2018-0369 Denial of service in Cisco StarOS unknown
- CVE-2017-6707 Command injection in Cisco StarOS
- CVE-2021-1539 Cisco ASR 5000 Series Software Authorization Bypass Vulnerabilities
Sources
Also known as GHSA-4hw8-23gq-m2qg.