CVE-2019-6293 — Uncontrolled Recursion in Flex
Severity
5.5MEDIUMNVD
EPSS
0.5%
top 36.25%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJan 15
Latest updateMay 13
Description
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages25 packages
🔴Vulnerability Details
2📋Vendor Advisories
3Red Hat▶
flex: Recursive calls in the function mark_beginning_as_normal resulting in a denial of service↗2019-01-09
Microsoft▶
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 i↗2019-01-08
Debian▶
CVE-2019-6293: flex - An issue was discovered in the function mark_beginning_as_normal in nfa.c in fle...↗2019