Vulnerability Details : CVE-2019-6293

An issue was discovered in the function mark_beginning_as_normal in nfa.c in flex 2.6.4. There is a stack exhaustion problem caused by the mark_beginning_as_normal function making recursive calls to itself in certain scenarios involving lots of '*' characters. Remote attackers could leverage this vulnerability to cause a denial-of-service.
Published 2019-01-15 00:29:01
Updated 2023-10-06 17:12:22
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Denial of service

Exploit prediction scoring system (EPSS) score for CVE-2019-6293

EPSS FAQ
0.09%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 37 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-6293

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
 MEDIUM AV:N/AC:M/Au:N/C:N/I:N/A:P
8.6
2.9
 NIST
5.5
 MEDIUM CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
1.8
3.6
 NIST

CWE ids for CVE-2019-6293

  • The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-6293

  • https://github.com/westes/flex/issues/414
    Stack Comsumption Problem Caused By the mark_beginning_as_normal Function Making Recursive Calls to Itself · Issue #414 · westes/flex · GitHub
    Exploit;Third Party Advisory

Products affected by CVE-2019-6293

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