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Debian Security Advisory DSA-4963-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
August 24, 2021                       https://www.debian.org/security/faq
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Package        : openssl
CVE ID         : CVE-2021-3711 CVE-2021-3712

Multiple vulnerabilities have been discovered in OpenSSL, a Secure
Sockets Layer toolkit.

CVE-2021-3711

    John Ouyang reported a buffer overflow vulnerability in the SM2
    decryption. An attacker able to present SM2 content for
    decryption to an application can take advantage of this flaw to
    change application behaviour or cause the application to crash
    (denial of service).

CVE-2021-3712

    Ingo Schwarze reported a buffer overrun flaw when processing ASN.1
    strings in the X509_aux_print() function, which can result in denial
    of service.

Additional details can be found in the upstream advisory:
https://openssl-library.org/news/secadv/20210824.txt

For the oldstable distribution (buster), these problems have been fixed
in version 1.1.1d-0+deb10u7.

For the stable distribution (bullseye), these problems have been fixed in
version 1.1.1k-1+deb11u1.

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