CVE-2024-31309CWE-20

Apache Traffic Server: HTTP/2 CONTINUATION frames can be utilized for DoS attack

High · published April 10, 2024

Patch now

High probability of exploitation

CVSS calls it high at 7.5. It sits in the 99.9th percentile for exploit probability.

CVSS v3.1
7.5
EPSS
95%
Percentile
99.9
In the wild
Unconfirmed
What it is

HTTP/2 CONTINUATION DoS attack can cause Apache Traffic Server to consume more resources on the server.  Version from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.3 are affected.

Users can set a new setting (proxy.config.http2.max_continuation_frames_per_minute) to limit the number of CONTINUATION frames per minute.  ATS does have a fixed amount of memory a request can use and ATS adheres to these limits in previous releases.

Users are recommended to upgrade to versions 8.1.10 or 9.2.4 which fixes the issue.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.94615 · 99.9th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2024-04-10T12:07Z
EPSS history
Timeline
  • 10 APR 12:07Z
    Apache Traffic Server: HTTP/2 CONTINUATION frames can be utilized for DoS attack
    cvelistv5