CVE-2020-7667 Arbitrary File Write via Archive Extraction (Zip Slip)
Attackers can write arbitrary files outside the intended directory via malicious CPIO archives in the go-rpmutils library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-7667?
CVE-2020-7667 is a high-severity path traversal vulnerability in github.com/sassoftware/go-rpmutils/cpio, published on 24 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In package github.com/sassoftware/go-rpmutils/cpio before version 0.1.0, the CPIO extraction functionality doesn't sanitize the paths of the archived files for leading and non-leading ".." which leads in file extraction outside of the current directory. Note: the fixing commit was applied to all affected versions which were re-released.
Weakness: CWE-22
Which versions are affected by CVE-2020-7667?
3 open source packages ship an affected version, including github.com/sassoftware/go-rpmutils. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/sassoftware/go-rpmutils Go | All versions | 0.1.0 |
github.com/sassoftware/go-rpmutils Go | All versions | 0.1.0 |
github.com/sassoftware/go-rpmutils Go | All versions | 0.1.0 |
Products include Sas Go Rpm Utils.
How do I fix CVE-2020-7667?
Upgrade github.com/sassoftware/go-rpmutils to 0.1.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2020-7667 being exploited?
There is no known exploitation of CVE-2020-7667 in the wild and no public exploit code.
Sources
Also known as GHSA-9423-6c93-gpp8, GO-2020-0042, SNYK-GOLANG-GITHUBCOMSASSOFTWAREGORPMUTILSCPIO-570427.