Critical severity · published Dec 8, 2021
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
9.8
CVSS
17.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)17.6% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CB
Cloud Backup · Netapp
All versions, or not specified · source: NVD
CC
Communications Cloud Native Core Binding Support Function · Oracle
1.11.0 · source: NVD
CC
Communications Cloud Native Core Network Repository Function · Oracle
1.15.0; 1.15.1 · source: NVD
CC
Communications Cloud Native Core Network Slice Selection Function · Oracle
1.8.0 · source: NVD
CP
Communications Policy Management · Oracle
12.6.0.0.0 · source: NVD
ES
E-series Santricity OS Controller · Netapp
11.0 through 11.70.1 · source: NVD
NS
Nss · Mozilla
before 3.73 · source: NVD
NE
Nss Esr · Mozilla
before 3.68.1 · source: NVD
SS
Starwind San & Nas · Starwindsoftware
v8r13 · source: NVD
SV
Starwind Virtual San · Starwindsoftware
v8r13 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43527
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43527
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1737470
Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf
Vendor Advisory
https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/
Vendor Advisory
https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/
Third Party Advisory
https://security.gentoo.org/glsa/202212-05
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211229-0002/
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