** Changed in: openssl (Ubuntu)
Status: New => Confirmed
** Changed in: openssl (Ubuntu)
Importance: Undecided => Wishlist
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https://bugs.launchpad.net/bugs/1590163
Title:
disable export grade ciphers
Status in openssl package in Ubuntu:
Confirmed
Bug description:
# System
device: Aquaris BQ E4.5
OS: Ubuntu 15.04, OTA-11
OpenSSL version:
$dpkg --list |grep libssl
ii libssl1.0.0:armhf 1.0.1f-1ubuntu11.6
armhf Secure Sockets Layer toolkit
- shared libraries
# Observed behaviour
OpenSSL provides export grade ciphers:
$openssl ciphers -v EXP
EXP-EDH-RSA-DES-CBC-SHA SSLv3 Kx=DH(512) Au=RSA Enc=DES(40) Mac=SHA1
export
EXP-EDH-DSS-DES-CBC-SHA SSLv3 Kx=DH(512) Au=DSS Enc=DES(40) Mac=SHA1
export
EXP-ADH-DES-CBC-SHA SSLv3 Kx=DH(512) Au=None Enc=DES(40) Mac=SHA1
export
EXP-DES-CBC-SHA SSLv3 Kx=RSA(512) Au=RSA Enc=DES(40) Mac=SHA1
export
EXP-RC2-CBC-MD5 SSLv3 Kx=RSA(512) Au=RSA Enc=RC2(40) Mac=MD5
export
EXP-ADH-RC4-MD5 SSLv3 Kx=DH(512) Au=None Enc=RC4(40) Mac=MD5
export
EXP-RC4-MD5 SSLv3 Kx=RSA(512) Au=RSA Enc=RC4(40) Mac=MD5
export
# Expected behaviour
No export grade ciphers are provided in binaries.
# Rationale
Export grade ciphers are insecure. By design. In response to FREAK and
Logjam attacks, OpenSSL developers disabled export grade ciphers in
OpenSSL v1.0.1m (March 2015),
cf.
<URL:https://www.openssl.org/blog/blog/2015/05/20/logjam-freak-upcoming-changes/>.
To bypass similar future attacks, deactivation of export grade ciphers should
be
backported to 15.04.
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