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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.088 (95.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.088 · newest: 0.088 · change: 0.000
Affected products
- Westes Flex
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2016/07/18/8 (mailing-list, Third Party Advisory, Release Notes)
- www.openwall.com/lists/oss-security/2016/07/26/12 (mailing-list, Third Party Advisory, Release Notes)
- github.com/westes/flex/commit/a5cbe929ac3255d371e698f62dc256afe7006466 (Patch)
- www.debian.org/security/2016/dsa-3653 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201701-31 (vendor-advisory)
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.