What is CVE-2015-3249?

CVE-2015-3249 is a critical-severity vulnerability in Apache Traffic Server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-10-30.

How severe is CVE-2015-3249?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Apache Traffic Server

CVE-2015-3249

The HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.1 allows remote attackers to cause a denial of service (out-of-bounds access and daemon crash) or possibly execute arbitrary code via vectors related to the (1) frame_handlers array or (2) set_dynamic_table_size function.

Vulnerability class: Buffer Overflow

Published 2017-10-30 · last modified 2026-06-17.

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: 0.054 (92.7th percentile), scored 2026-10-22.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.054 · newest: 0.054 · change: 0.000

Affected products

Apache Traffic Server — versions 5.3.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.securityfocus.com/bid/101631 (VDB Entry, Third Party Advisory, vdb-entry)
yahoo-security.tumblr.com/post/122883273670/apache-traffic-server-http2-fuzzing (Third Party Advisory, Issue Tracking)
mail-archives.us.apache.org/mod_mbox/www-announce/201507.mbox/<CABF6JR37mWzDmXD… (mailing-list)

Frequently asked questions

What is CVE-2015-3249?: CVE-2015-3249 is a critical-severity vulnerability in Apache Traffic Server, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2017-10-30.
How severe is CVE-2015-3249?: Critical severity. CVSS v3 base score is 9.8 out of 10.