Bug ID 1020941: HTTP/2 header frames decoding may fail with COMPRESSION_ERROR when frame delivered in multiple xfrags

Last Modified: Jul 12, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
16.1.0, 16.0.1, 16.0.0, 15.1.3, 15.1.2, 15.1.1, 15.1.0, 15.0.1, 15.0.0, 14.1.4, 14.1.3, 14.1.2, 14.1.0

Fixed In:
16.1.0, 15.1.4,

Opened: May 24, 2021

Severity: 3-Major


HTTP/2 request fails with COMPRESSION_ERROR.


The header value length is incorrectly updated, and the HTTP/2 request fails.


HTTP/2 header frames are received in multiple xfrags in such a way that the first 2 bytes of 'encoded' header-field 'value-length' are the last 2 bytes of the xfrag, and the remaining bytes are in the next xfrag.



Fix Information

HTTP/2 now parses the request, regardless of its xfrags distribution.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips