Bug ID 503620: ECDHE_ECDSA and DHE_DSS ciphers do not work with OpenSSL 1.0.1k and later

Last Modified: Apr 10, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.2, 11.5.2 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5, 11.5.3

Opened: Jan 29, 2015
Severity: 2-Critical
Related AskF5 Article:
K16461

Symptoms

BIG-IP SSL when using ciphers ECDHE_ECDSA and DHE_DSS does not work consistently with OpenSSL clients using OpenSSL versions 1.0.1k or later.

Impact

SSL handshake failed. The OpenSSL clients might encounter a decryption error while reading the server key exchange.

Conditions

When the ciphers used are ECDHE_ECDSA or DHE_DSS, and the OpenSSL clients have versions later than OpenSSL 1.0.1k.

Workaround

Use OpenSSL versions earlier than OpenSSL 1.0.1k.

Fix Information

BIG-IP SSL now works well with ciphers ECDHE_ECDSA or DHE_DSS with OpenSSL client version OpenSSL 1.0.1k and later.

Behavior Change