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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 17.6%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 17.56% probability · 97th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- mozilla/nss · mozilla/nss esr · netapp/cloud backup · netapp/e-series santricity os controller · oracle/communications cloud native core binding support function · oracle/communications cloud native core network repository function · oracle/communications cloud native core network slice selection function · oracle/communications policy management · starwindsoftware/starwind san \& nas · starwindsoftware/starwind virtual san
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1737470Issue Tracking, Permissions Required, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdfThird Party 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/Vendor Advisory
- https://security.gentoo.org/glsa/202212-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211229-0002/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-51/Vendor Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.starwindsoftware.com/security/sw-20220802-0001/Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1737470Issue Tracking, Permissions Required, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdfThird Party 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/Vendor Advisory
- https://security.gentoo.org/glsa/202212-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211229-0002/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-51/Vendor Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.starwindsoftware.com/security/sw-20220802-0001/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.