CVE-2019-16214 Information

Description

Libra Core before 2019-09-03 has an erroneous regular expression for inline comments which makes it easier for attackers to interfere with code auditing by using a nonstandard line-break character for a comment. For example a Move module author can enter the // sequence (which introduces a single-line comment) followed by very brief comment text the \r character and code that has security-critical functionality. In many popular environments this code is displayed on a separate line and thus a reader may infer that the code is executed. However the code is NOT executed because language/compiler/ir_to_bytecode/src/parser.rs allows the comment to continue after the \r character.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

Reference

https://blog.openzeppelin.com/libra-vulnerability-release/ https://blog.openzeppelin.com/libra-vulnerability-summary/ https://github.com/libra/libra/commit/7efb0221989f17fdf7f8486730898ed947a1e19e

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

5.7