Vulnerability CVE-2019-16214


Published: 2019-09-11

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.

Type:

CWE-20

(Improper Input Validation)

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None

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

Copyright 2019, cxsecurity.com

 

Back to Top