CVE-2021-43527

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.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.mozilla.org/security/advisories/mfsa2021-51/	Vendor Advisory
https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/	Vendor Advisory
https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/	Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1737470	Issue Tracking Permissions Required Vendor Advisory
https://security.netapp.com/advisory/ntap-20211229-0002/

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:nss::::::::
	cpe:2.3:a:mozilla:nss_esr::::::::

Information

Published : 2021-12-08 22:15

Updated : 2021-12-29 21:15

NVD link : CVE-2021-43527

Mitre link : CVE-2021-43527

JSON object : View

Products Affected

mozilla

nss
nss_esr

CWE

CWE-787

Out-of-bounds Write

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