USN-5672-1: GMP vulnerability

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• gmp - Multiprecision arithmetic library developers tools

Details

It was discovered that GMP did not properly manage memory
on 32-bit platforms when processing a specially crafted
input. An attacker could possibly use this issue to cause
applications using GMP to crash, resulting in a denial of
service.

Update instructions

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

Ubuntu 20.04

• libgmpxx4ldbl - 2:6.2.0+dfsg-4ubuntu0.1
• libgmp-dev - 2:6.2.0+dfsg-4ubuntu0.1
• libgmp10 - 2:6.2.0+dfsg-4ubuntu0.1

Ubuntu 18.04

• libgmpxx4ldbl - 2:6.1.2+dfsg-2ubuntu0.1
• libgmp-dev - 2:6.1.2+dfsg-2ubuntu0.1
• libgmp10 - 2:6.1.2+dfsg-2ubuntu0.1

Ubuntu 16.04

• libgmpxx4ldbl - 2:6.1.0+dfsg-2ubuntu0.1~esm1
  Available with Ubuntu Pro
• libgmp-dev - 2:6.1.0+dfsg-2ubuntu0.1~esm1
  Available with Ubuntu Pro
• libgmp10 - 2:6.1.0+dfsg-2ubuntu0.1~esm1
  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

• CVE-2021-43618

Related notices

• USN-5672-2: libgmp10, gmp, libgmp-dev, libgmp3-dev, libgmpxx4ldbl, libgmp10-doc