nasm regression

USN-8248-1 fixed vulnerabilities in NASM. Unfortunately the update
introduced a regression which could cause NASM to crash. This update fixes
the problem by reverting the fix for CVE-2021-33450 and CVE-2021-33452 in
Ubuntu 24.04 LTS.

We apologize for the inconvenience.

Original advisory details:

Daisy Chen discovered that NASM was vulnerable to a heap buffer overflow
when handling certain input. An attacker could possibly use this issue to
cause NASM to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2023-31722)

It was discovered that NASM incorrectly handled memory allocation. An
attacker could possibly use this issue to cause NASM to use excessive
resources, leading to a denial of service. This issue only affected
Ubuntu 24.04 LTS. (CVE-2021-33452, CVE-2021-33450)