Headline
Ubuntu Security Notice USN-5672-1
Ubuntu Security Notice 5672-1 - 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.
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Ubuntu Security Notice USN-5672-1
October 12, 2022
GMP vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
Summary:
GMP could be made to crash if it received specially crafted
input.
Software Description:
- 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 LTS:
libgmp-dev 2:6.2.0+dfsg-4ubuntu0.1
libgmp10 2:6.2.0+dfsg-4ubuntu0.1
libgmpxx4ldbl 2:6.2.0+dfsg-4ubuntu0.1
Ubuntu 18.04 LTS:
libgmp-dev 2:6.1.2+dfsg-2ubuntu0.1
libgmp10 2:6.1.2+dfsg-2ubuntu0.1
libgmpxx4ldbl 2:6.1.2+dfsg-2ubuntu0.1
Ubuntu 16.04 ESM:
libgmp-dev 2:6.1.0+dfsg-2ubuntu0.1~esm1
libgmp10 2:6.1.0+dfsg-2ubuntu0.1~esm1
libgmpxx4ldbl 2:6.1.0+dfsg-2ubuntu0.1~esm1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5672-1
CVE-2021-43618
Package Information:
https://launchpad.net/ubuntu/+source/gmp/2:6.2.0+dfsg-4ubuntu0.1
https://launchpad.net/ubuntu/+source/gmp/2:6.1.2+dfsg-2ubuntu0.1
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GNU Multiple Precision Arithmetic Library (GMP) through 6.2.1 has an mpz/inp_raw.c integer overflow and resultant buffer overflow via crafted input, leading to a segmentation fault on 32-bit platforms.