Summary
John Ouyang discovered that OpenSSL incorrectly handled decrypting SM2
data. A remote attacker could use this issue to cause applications using
OpenSSL to crash, resulting in a denial of service, or possibly change
application behaviour. (CVE-2021-3711)
Ingo Schwarze discovered that OpenSSL incorrectly handled certain ASN.1
strings. A remote attacker could use this issue to cause OpenSSL to crash,
resulting in a denial of service, or possibly obtain sensitive information.
(CVE-2021-3712)
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 18.04 LTS 18.04:LTS | openssl | 1.1.1-1ubuntu2.1~18.04.13 |
| Ubuntu · 20.04 LTS 20.04:LTS | openssl | 1.1.1f-1ubuntu2.8 |
Vulnerabilities 2
-
Critical 9.8
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…
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High 7.4
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…