PT-2019-11536 · Perl · Crypt::Jwt

Jeremy Choi · Published 2019-07-17 · Updated 2020-08-24 · CVE-2019-1010263

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: Perl Crypt::JWT versions prior to 0.023

Description: The issue allows attackers to bypass authentication by providing a crafted token using the hmac() function. This is due to incorrect access control in the JWT.pm component, specifically at line 614. The attack vector is through network connectivity.

Recommendations: For versions prior to 0.023, update to a version after commit b98a59b42ded9f9e51b2560410106207c2152d6c to resolve the issue. As a temporary workaround, consider restricting network connectivity to minimize the risk of exploitation.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2019-1010263

Affected Products

Crypt::Jwt

References · 7

• 🔥 https://openwall.com/lists/oss-security/2018/09/07/1 · Exploit
• https://github.com/DCIT/perl-Crypt-JWT/commit/b98a59b42ded9f9e51b2560410106207c2152d6c · Patch
• https://osv.dev/vulnerability/CVE-2019-1010263 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-1010263 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-1010263 · Security Note
• https://ubuntu.com/security/CVE-2019-1010263 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-1010263 · Security Note