CVE-2021-43527

critical

Description

NSS (Network Security Services) versions prior to 3.73 or 3.68.1 ESR are 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. *Note: This vulnerability does NOT impact Mozilla Firefox.* However, email clients and PDF viewers that use NSS for signature verification, such as Thunderbird, LibreOffice, Evolution and Evince are believed to be impacted. This vulnerability affects NSS < 3.73 and NSS < 3.68.1.

References

https://www.mozilla.org/security/advisories/mfsa2021-51/

https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/

https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/

https://bugzilla.mozilla.org/show_bug.cgi?id=1737470

https://security.netapp.com/advisory/ntap-20211229-0002/

https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf

https://www.oracle.com/security-alerts/cpuapr2022.html

https://www.starwindsoftware.com/security/sw-20220802-0001/

https://security.gentoo.org/glsa/202212-05

Details

Source: MITRE

Published: 2021-12-08

Updated: 2022-12-19

Type: CWE-787

Risk Information

CVSS v2

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL