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OpenAdvisories
Critical DSA-4963-1 2 CVEs

openssl - security update

Published Aug 24, 2021 · Updated Mar 9, 2026

Fixed packages 2

ReleasePackageFixed in
Debian · 10 openssl 1.1.1d-0+deb10u7
Debian · 11 openssl 1.1.1k-1+deb11u1

Vulnerabilities 2

  • Critical 9.8
    CVE-2021-3711 Public exploit EPSS 88%

    SM2 Decryption Buffer Overflow

    In order to decrypt SM2 encrypted data an application is expected to call the API function EVP_PKEY_decrypt(). Typically an application will call this function twice. The first time, on entry, the "out" parameter can be NULL and, on exit, the "outlen" paramet…

  • High 7.4
    CVE-2021-3712 Public exploit EPSS 48%

    Read buffer overruns processing ASN.1 strings

    ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings which are repesented as a buffer for the string dat…