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Debian Security Advisory DSA-3967-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
September 08, 2017 https://www.debian.org/security/faq
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Package : mbedtls
CVE ID : CVE-2017-14032
Debian Bug : 873557

An authentication bypass vulnerability was discovered in mbed TLS, a
lightweight crypto and SSL/TLS library, when the authentication mode is
configured as ‘optional’. A remote attacker can take advantage of this
flaw to mount a man-in-the-middle attack and impersonate an intended
peer via an X.509 certificate chain with many intermediates.

For the stable distribution (stretch), this problem has been fixed in
version 2.4.2-1+deb9u1.

For the testing distribution (buster), this problem has been fixed
in version 2.6.0-1.

For the unstable distribution (sid), this problem has been fixed in
version 2.6.0-1.

We recommend that you upgrade your mbedtls packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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