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Clarify attack conditions in the ChangeLog.

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Referring to the previous entry could imply that the current one was limited
to SHA-384 too, which it isn't.
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Manuel Pégourié-Gonnard 2018-07-11 18:27:08 +02:00
parent 6a25cfae2a
commit 830ce11eba
1 changed files with 7 additions and 4 deletions
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11
ChangeLog
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@ -19,10 +19,13 @@ Security
* Fix a vulnerability in TLS ciphersuites based on CBC, in (D)TLS 1.0 to * Fix a vulnerability in TLS ciphersuites based on CBC, in (D)TLS 1.0 to
1.2, that allowed a local attacker, able to execute code on the local 1.2, that allowed a local attacker, able to execute code on the local
machine as well as manipulate network packets, to partially recover the machine as well as manipulate network packets, to partially recover the
plaintext of messages under some conditions (see previous entry) by using plaintext of messages under some conditions by using a cache attack
a cache attack targetting an internal MD/SHA buffer. Connections using targetting an internal MD/SHA buffer. With TLS or if
GCM or CCM instead of CBC or using Encrypt-then-Mac (RFC 7366) were not mbedtls_ssl_conf_dtls_badmac_limit() was used, the attack only worked if
affected. Found by Kenny Paterson, Eyal Ronen and Adi Shamir. the same secret (for example a HTTP Cookie) has been repeatedly sent over
connections manipulated by the attacker. Connections using GCM or CCM
instead of CBC or using Encrypt-then-Mac (RFC 7366) were not affected.
Found by Kenny Paterson, Eyal Ronen and Adi Shamir.
* Add a counter-measure against a vulnerability in TLS ciphersuites based * Add a counter-measure against a vulnerability in TLS ciphersuites based
on CBC, in (D)TLS 1.0 to 1.2, that allowed a local attacker, able to on CBC, in (D)TLS 1.0 to 1.2, that allowed a local attacker, able to
execute code on the local machine as well as manipulate network packets, execute code on the local machine as well as manipulate network packets,