CVE-2018-1002208 Improper Limitation of a Pathname to a Restricted Directory in SharpZipLib
Attackers can write arbitrary files via directory traversal in Zip archives, impacting applications using SharpZipLib for extraction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-1002208?
CVE-2018-1002208 is a medium-severity path traversal vulnerability in SharpZipLib, published on 25 Jul 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
SharpZipLib before 1.0 RC1 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in a Zip archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'.
Weakness: CWE-22
Which versions are affected by CVE-2018-1002208?
2 open source packages ship an affected version, including SharpZipLib. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
SharpZipLib NuGet | All versions | 1.0.0-rc1 |
SharpZipLib NuGet | All versions | 1.0.0-rc1 |
Products include Sharpziplib Project Sharpziplib.
How do I fix CVE-2018-1002208?
Upgrade SharpZipLib to 1.0.0-rc1 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2018-1002208 being exploited?
There is no known exploitation of CVE-2018-1002208 in the wild and no public exploit code.
Other vulnerabilities in SharpZipLib
Sources
Also known as DEBIAN-CVE-2018-1002208, GHSA-cqj4-m2pc-v9m5, SNYK-DOTNET-SHARPZIPLIB-60247, UBUNTU-CVE-2018-1002208.