PT-2017-10869 · Creolabs · Creolabs Gravity

R0T0Tiller · Published 2017-11-17 · Updated 2017-11-30 · CVE-2017-1000172

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 Creolabs Gravity version 1.0

Description The issue is related to a Use-After-Free condition, which can lead to possible code execution. Specifically, it is a Heap-Use-After-Free that occurs after the 'sublexer' pointer has been freed. In the gravity lexer.c file, at line 542, the lexer is being used to access a variable, but the lexer has already been freed, creating a Heap Use-After-Free condition.

Recommendations For Creolabs Gravity version 1.0, as a temporary workaround, consider restricting access to the lexer variable after it has been freed to minimize the risk of exploitation. However, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2017-1000172

Affected Products

Creolabs Gravity

References · 3

• 🔥 https://github.com/marcobambini/gravity/issues/144 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2017-1000172 · Security Note
• https://osv.dev/vulnerability/CVE-2017-1000172 · Vendor Advisory