RCE in Mechanize Project
CVE-2021-21289
Mechanize is an open-source ruby library that makes automated web interaction easy. In Mechanize from version 2.0.0 and before version 2.7.7 there is a command injection vulnerability. Affected versions of mechanize allow for OS commands to be injected using several classes' methods which implicitly use Ruby's Kernel.open method. Exploitation is possible only if untrusted input is used as a local filename and passed to any of these calls: Mechanize::CookieJar#load, Mechanize::CookieJar#save_as, Mechanize#download, Mechanize::Download#save, Mechanize::File#save, and Mechanize::FileResponse#read_body. This is fixed in version 2.7.7.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.035 (88.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · change: 0.000
Affected products
- Mechanize Project
- Sparklemotion Mechanize — versions >= 2.0, < 2.7.7
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 32, 33
Weakness classification (CWE)
References
- github.com/sparklemotion/mechanize/security/advisories/GHSA-qrqm-fpv6-6r8g (Third Party Advisory)
- rubygems.org/gems/mechanize/ (Product, Third Party Advisory)
- github.com/sparklemotion/mechanize/releases/tag/v2.7.7 (Third Party Advisory, Release Notes)
- github.com/sparklemotion/mechanize/commit/66a6a1bfa653a5f13274a396a5e5441238656… (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2021/02/msg00021.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202107-17 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21289?
- CVE-2021-21289 is a high-severity vulnerability in Mechanize Project, classified under OS Command Injection. CVSS score: 7.4/10. Published 2021-02-02.
- How severe is CVE-2021-21289?
- High severity. CVSS v3 base score is 7.4 out of 10.