Zero-day vulnerability in Google Chrome

Exposed dangerous method or function

Not patched

Vulnerability exploitation was spotted by EdgeSpot in late December 2018. The company detected multiple PDF samples in the wild that use dangerous JavaScript method to send information, retrieved from user's computer to a third-party domain.

Vulnerability details

Advisory: SB2019022803 - Information disclosure via PDF files in Google Chrome

Vulnerable component: Google Chrome

CVE-ID:

CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:H/RL:U/RC:C

CWE-ID: CWE-749 - Exposed Dangerous Method or Function

Description:

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the PDF viewer allows sending information to a third-party domain via the "this.submitForm()" PDF Javascript API. A remote attacker can trick the victim into opening a specially crafted PDF file with Google Chrome and obtain sensitive information.

Note: the vulnerability is being actively exploited in the wild.

External links:

https://blog.edgespot.io/2019/02/edgespot-detects-pdf-zero-day-samples.html

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.