PT-2018-4236 · Gyazo · Gyazo Gem

Larry W. Cashdollar + 1 · Published 2018-01-10 · Updated 2018-01-30 · CVE-2014-4994

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions gyazo gem version 1.0.0

Description The issue allows local users to write to arbitrary files via a symlink attack on a temporary file, related to time-based filenames. This is due to a problem in the lib/gyazo/client.rb file.

Recommendations For gyazo gem version 1.0.0, consider restricting access to temporary files created by the lib/gyazo/client.rb file to prevent a symlink attack. As a temporary workaround, avoid using time-based filenames in the affected file until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2014-4994

GHSA-6X45-86Q6-RCMR

Affected Products

Gyazo Gem

References · 8

• 🔥 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/gyazo/CVE-2014-4994.yml · Exploit
• 🔥 http://vapid.dhs.org/advisories/gyazo-1.0.0.html · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2014-4994 · Security Note
• https://osv.dev/vulnerability/GHSA-6x45-86q6-rcmr · Vendor Advisory
• https://github.com/gyazo/gyazo-ruby · Note
• http://openwall.com/lists/oss-security/2014/07/07/13 · Note
• http://openwall.com/lists/oss-security/2014/07/17/5 · Note
• https://web.archive.org/web/20200229061943/http://vapid.dhs.org/advisories/gyazo-1.0.0.html · Note