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[SECURITY] [DLA 2565-1] openssl1.0 security update



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Debian LTS Advisory DLA-2565-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                           Chris Lamb
February 18, 2021                             https://wiki.debian.org/LTS
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Package        : openssl1.0
Version        : 1.0.2u-1~deb9u4
CVE IDs        : CVE-2021-23840 CVE-2021-23841

It was discovered that there were two issues in the 1.0 branch of the
OpenSSL cryptographic system:

 * CVE-2021-23840: Prevent an issue where "Digital EnVeloPe"
   EVP-related calls could cause applications to behave incorrectly
   or even crash.

 * CVE-2021-23841: Prevent an issue in the X509 certificate
   handling caused by the lack of error handling whilst parsing
   "issuer" fields.

For Debian 9 "Stretch", these problems have been fixed in version
1.0.2u-1~deb9u4. For the equivalent changes for the 1.1 branch of
OpenSSL, please see DLA-2563-1.

We recommend that you upgrade your openssl1.0 packages.

For the detailed security status of openssl1.0 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/openssl1.0

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

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