QID 353096

Package updates are available for amazon linux that fix the following vulnerabilities:
cve-2021-43527: nss (network security services) up to and including 3.73 is vulnerable to a heap overflow when handling der-encoded dsa or rsa-pss signatures.
Applications using nss for handling signatures encoded within cms, s/mime, pkcs \#7, or pkcs \#12 are likely to be impacted.
Applications using nss for certificate validation or other tls, x.509, ocsp or crl functionality may be impacted, depending on how they configure nss.
When verifying a der-encoded signature, nss decodes the signature into a fixed-size buffer and passes the buffer to the underlying pkcs \#11 module.
The length of the signature is not correctly checked when processing dsa and rsa-pss signatures.
Dsa and rsa-pss signatures larger than 16384 bits will overflow the buffer in vfycontextstr.
The vulnerable code is located within secvfy.c:vfy_createcontext.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.