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cvelistMozillaCVELIST:CVE-2021-43527
HistoryDec 08, 2021 - 12:00 a.m.

CVE-2021-43527

2021-12-0800:00:00
mozilla
www.cve.org
7
nss
network security services
heap overflow
der-encoded
signatures
cms
s/mime
pkcs
thunderbird
libreoffice
evolution
evince

AI Score

9.8

Confidence

High

EPSS

0.008

Percentile

81.4%

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.

CNA Affected

[
  {
    "vendor": "Mozilla",
    "product": "NSS",
    "versions": [
      {
        "version": "unspecified",
        "lessThan": "3.73",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "unspecified",
        "lessThan": "3.68.1",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]