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USN-5051-3: OpenSSL vulnerability

26 August 2021

OpenSSL could be made to crash or expose sensitive information if it received a specially crafted ASN.1 string.

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Releases

Packages

  • openssl1.0 - Secure Socket Layer (SSL) cryptographic library and tools

Details

USN-5051-1 fixed a vulnerability in OpenSSL. This update provides the
corresponding update for the openssl1.0 package in Ubuntu 18.04 LTS.

Original advisory details:

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 18.04

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

References

Related notices

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