PT-2017-5765 · Ruby · Aescrypt

Jfinkhaeuser · Published 2017-04-19 · Updated 2017-10-24 · CVE-2013-7463

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: aescrypt gem version 1.0.0

Description: The issue concerns the aescrypt gem for Ruby, which fails to randomize the CBC IV when using the AESCrypt.encrypt and AESCrypt.decrypt functions. This flaw enables attackers to bypass cryptographic protection through a chosen plaintext attack.

Recommendations: For aescrypt gem version 1.0.0, consider updating to a version that properly randomizes the CBC IV for the AESCrypt.encrypt and AESCrypt.decrypt functions to prevent chosen plaintext attacks. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use of Insufficiently Random Values

Weakness Enumeration

CWE-330

Related Identifiers

CVE-2013-7463

GHSA-4C4W-3Q45-HP9J

Affected Products

Aescrypt

References · 7

• 🔥 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/aescrypt/CVE-2013-7463.yml · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2013-7463 · Security Note
• https://osv.dev/vulnerability/GHSA-4c4w-3q45-hp9j · Vendor Advisory
• https://github.com/Gurpartap/aescrypt · Note
• https://github.com/Gurpartap/aescrypt/issues/4 · Note
• https://web.archive.org/web/20200227173428/http://securityfocus.com/bid/98035 · Note
• http://securityfocus.com/bid/98035 · Note