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Debian Security Advisory DSA-4475-1                   security@debian.org
https://www.debian.org/security/                       Moritz Muehlenhoff
July 01, 2019                         https://www.debian.org/security/faq
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Package        : openssl
CVE ID         : CVE-2019-1543

Joran Dirk Greef discovered that overly long nonces used with
ChaCha20-Poly1305 were incorrectly processed and could result in nonce
reuse. This doesn't affect OpenSSL-internal uses of ChaCha20-Poly1305
such as TLS.

For the stable distribution (stretch), this problem has been fixed in
version 1.1.0k-1~deb9u1. This DSA also upgrades openssl1.0 (which
itself is not affected by CVE-2019-1543) to 1.0.2s-1~deb9u1

We recommend that you upgrade your openssl packages.

For the detailed security status of openssl please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/openssl

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