CVE-2021-1612
23.09.2021, 03:15
A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to overwrite arbitrary files on the local system. This vulnerability is due to improper access controls on files within the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on an affected device.
| Vendor | Product | Version |
|---|---|---|
| cisco | sd-wan | 𝑥 < 17.3.4 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-61 - UNIX Symbolic Link (Symlink) FollowingThe software, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the software to operate on unauthorized files.
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.