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Debian Security Advisory DSA-4661-1                   security@debian.org
https://www.debian.org/security/                       Moritz Muehlenhoff
April 21, 2020                        https://www.debian.org/security/faq
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Package        : openssl
CVE ID         : CVE-2020-1967

Bernd Edlinger discovered that malformed data passed to the
SSL_check_chain() function during or after a TLS 1.3 handshake could
cause a NULL dereference, resulting in denial of service.

The oldstable distribution (stretch) is not affected.

For the stable distribution (buster), this problem has been fixed in
version 1.1.1d-0+deb10u3.

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