CVE-2020-26277 Arbitrary read/write in DBdeployer
Attackers can overwrite system files via malicious tarballs if users run the tool as root and skip checksum verification, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-26277?
CVE-2020-26277 is a medium-severity path traversal vulnerability in datacharmer dbdeployer, published on 21 Dec 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
DBdeployer is a tool that deploys MySQL database servers easily. In DBdeployer before version 1.58.2, users unpacking a tarball may use a maliciously packaged tarball that contains symlinks to files external to the target. In such scenario, an attacker could induce dbdeployer to write into a system file, thus altering the computer defenses. For the attack to succeed, the following factors need to contribute: 1) The user is logged in as root. While dbdeployer is usable as root, it was designed to run as unprivileged user. 2) The user has taken a tarball from a non secure source, without testing the checksum. When the tarball is retrieved through dbdeployer, the checksum is compared before attempting to unpack. This has been fixed in version 1.58.2.
Weakness: CWE-59
Which versions are affected by CVE-2020-26277?
3 open source packages ship an affected version, including github.com/datacharmer/dbdeployer. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/datacharmer/dbdeployer Go | All versions | 1.58.2 |
github.com/datacharmer/dbdeployer Go | All versions | 1.58.2 |
github.com/datacharmer/dbdeployer Go | All versions | 1.58.2 |
Products include Dbdeployer Dbdeployer.
How do I fix CVE-2020-26277?
Upgrade github.com/datacharmer/dbdeployer to 1.58.2 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2020-26277 being exploited?
There is no known exploitation of CVE-2020-26277 in the wild and no public exploit code.
Sources
Also known as GHSA-47wr-426j-fr82, GO-2022-0787.