Buffer overflow in Westes Flex

CVE-2016-6354

Heap-based buffer overflow in the yy_get_next_buffer function in Flex before 2.6.1 might allow context-dependent attackers to cause a denial of service or possibly execute arbitrary code via vectors involving num_to_read.

Vulnerability class: Buffer Overflow

EPSS: 0.088 (94.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • cve@mitre.org (mailing-list, x_refsource_MLIST, Third Party Advisory, Release Notes)
  • cve@mitre.org (mailing-list, x_refsource_MLIST, Third Party Advisory, Release Notes)
  • cve@mitre.org (x_refsource_CONFIRM, Patch)
  • cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
  • cve@mitre.org (vendor-advisory, x_refsource_GENTOO)

Frequently asked questions

What is CVE-2016-6354?
CVE-2016-6354 is a critical-severity vulnerability in Westes Flex, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2016-09-21.
How severe is CVE-2016-6354?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2016-6354 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.