CVE-2017-1000420 Syncthing vulnerable to symlink traversal and arbitrary file overwrite
Attackers can exploit symlink traversal in Syncthing to overwrite arbitrary files on the system.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-1000420?
CVE-2017-1000420 is a high-severity path traversal vulnerability in n/a, published on 2 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Syncthing version 0.14.33 and older is vulnerable to symlink traversal resulting in arbitrary file overwrite
Weakness: CWE-59
Which versions are affected by CVE-2017-1000420?
2 open source packages ship an affected version, including github.com/syncthing/syncthing. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/syncthing/syncthing Go | All versions to 0.14.33 | None |
github.com/syncthing/syncthing Go | All versions to 0.14.33 | None |
Products include Syncthing Syncthing.
How do I fix CVE-2017-1000420?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2017-1000420 being exploited?
There is no known exploitation of CVE-2017-1000420 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2017-1000420, GHSA-28xp-g7f6-7mhf.