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USN-5051-1: OpenSSL vulnerabilities

24 August 2021

Several security issues were fixed in OpenSSL.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Packages

  • openssl - Secure Socket Layer (SSL) cryptographic library and tools

Details

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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.04
Ubuntu 20.04
Ubuntu 18.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

Related notices

  • USN-5051-2: libssl-doc, openssl, libssl-dev, libssl1.0.0
  • USN-5051-3: libssl1.0-dev, libssl1.0.0, openssl1.0
  • USN-5088-1: ovmf, edk2, qemu-efi, ovmf-ia32, qemu-efi-arm, qemu-efi-aarch64