Amazon Linux 2 Security Advisory: ALAS-2021-1722
Advisory Release Date: 2021-12-01 07:11 Pacific
Advisory Updated Date: 2021-12-01 20:14 Pacific
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. (CVE-2021-43527)
Affected Packages:
nss, nss-util, nss-softokn, nspr
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update nss to update your system.
Run yum update nss-util to update your system.
Run yum update nss-softokn to update your system.
Run yum update nspr to update your system.
aarch64:
nspr-4.32.0-1.amzn2.aarch64
nspr-devel-4.32.0-1.amzn2.aarch64
nspr-debuginfo-4.32.0-1.amzn2.aarch64
nss-util-3.67.0-1.amzn2.aarch64
nss-util-devel-3.67.0-1.amzn2.aarch64
nss-util-debuginfo-3.67.0-1.amzn2.aarch64
nss-softokn-3.67.0-3.amzn2.aarch64
nss-softokn-freebl-3.67.0-3.amzn2.aarch64
nss-softokn-freebl-devel-3.67.0-3.amzn2.aarch64
nss-softokn-devel-3.67.0-3.amzn2.aarch64
nss-softokn-debuginfo-3.67.0-3.amzn2.aarch64
nss-3.67.0-4.amzn2.0.1.aarch64
nss-tools-3.67.0-4.amzn2.0.1.aarch64
nss-sysinit-3.67.0-4.amzn2.0.1.aarch64
nss-devel-3.67.0-4.amzn2.0.1.aarch64
nss-pkcs11-devel-3.67.0-4.amzn2.0.1.aarch64
nss-debuginfo-3.67.0-4.amzn2.0.1.aarch64
i686:
nspr-4.32.0-1.amzn2.i686
nspr-devel-4.32.0-1.amzn2.i686
nspr-debuginfo-4.32.0-1.amzn2.i686
nss-util-3.67.0-1.amzn2.i686
nss-util-devel-3.67.0-1.amzn2.i686
nss-util-debuginfo-3.67.0-1.amzn2.i686
nss-softokn-3.67.0-3.amzn2.i686
nss-softokn-freebl-3.67.0-3.amzn2.i686
nss-softokn-freebl-devel-3.67.0-3.amzn2.i686
nss-softokn-devel-3.67.0-3.amzn2.i686
nss-softokn-debuginfo-3.67.0-3.amzn2.i686
nss-3.67.0-4.amzn2.0.1.i686
nss-tools-3.67.0-4.amzn2.0.1.i686
nss-sysinit-3.67.0-4.amzn2.0.1.i686
nss-devel-3.67.0-4.amzn2.0.1.i686
nss-pkcs11-devel-3.67.0-4.amzn2.0.1.i686
nss-debuginfo-3.67.0-4.amzn2.0.1.i686
src:
nspr-4.32.0-1.amzn2.src
nss-util-3.67.0-1.amzn2.src
nss-softokn-3.67.0-3.amzn2.src
nss-3.67.0-4.amzn2.0.1.src
x86_64:
nspr-4.32.0-1.amzn2.x86_64
nspr-devel-4.32.0-1.amzn2.x86_64
nspr-debuginfo-4.32.0-1.amzn2.x86_64
nss-util-3.67.0-1.amzn2.x86_64
nss-util-devel-3.67.0-1.amzn2.x86_64
nss-util-debuginfo-3.67.0-1.amzn2.x86_64
nss-softokn-3.67.0-3.amzn2.x86_64
nss-softokn-freebl-3.67.0-3.amzn2.x86_64
nss-softokn-freebl-devel-3.67.0-3.amzn2.x86_64
nss-softokn-devel-3.67.0-3.amzn2.x86_64
nss-softokn-debuginfo-3.67.0-3.amzn2.x86_64
nss-3.67.0-4.amzn2.0.1.x86_64
nss-tools-3.67.0-4.amzn2.0.1.x86_64
nss-sysinit-3.67.0-4.amzn2.0.1.x86_64
nss-devel-3.67.0-4.amzn2.0.1.x86_64
nss-pkcs11-devel-3.67.0-4.amzn2.0.1.x86_64
nss-debuginfo-3.67.0-4.amzn2.0.1.x86_64