Gyazo allows local users to write arbitrary files

MEDIUM 5.5CVE-2014-4994 · GHSA-6x45-86q6-rcmr · Published 10/01/2018 · updated 17/06/2026

In short

CVE-2014-4994 is a MEDIUM (CVSS 5.5) vulnerability affecting gyazo, gyazo (gyazo project).
Chance of exploitation in the next 30 days (EPSS): 0.48%, higher than 41.4% of all vulnerabilities.
Fix: update to 2.0.0 or later.

Package	Affected versions	Patched versions
gyazo RubyGems	`≥ 1.0.0, < 2.0.0`	`2.0.0`
gyazo gyazo_project	`= 1.0.0`	No fix yet

Description

lib/gyazo/client.rb in the gyazo gem 1.0.0 for Ruby allows local users to write to arbitrary files via a symlink attack on a temporary file, related to time-based filenames.

NVD description

lib/gyazo/client.rb in the gyazo gem 1.0.0 for Ruby allows local users to write to arbitrary files via a symlink attack on a temporary file, related to time-based filenames.

References

nvd.nist.gov/vuln/detail/CVE-2014-4994 · ADVISORY
gyazo/gyazo-ruby · PACKAGE
rubysec/ruby-advisory-db · WEB
web.archive.org/web/20200229061943/http://www.vapid.dhs.org/advisories/gyazo-1.0.0.html · WEB
openwall.com/lists/oss-security/2014/07/07/13 · WEB
openwall.com/lists/oss-security/2014/07/17/5 · WEB
vapid.dhs.org/advisories/gyazo-1.0.0.html · Exploit

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