CVE-2021-43527

Published on: Not Yet Published

Last Modified on: 12/19/2022 04:15:00 AM UTC

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

Certain versions of Nss from Mozilla contain the following vulnerability:

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.

  • CVE-2021-43527 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as CRITICAL severity.
  • Affected Vendor/Software: URL Logo Mozilla - NSS version < 3.73
  • Affected Vendor/Software: URL Logo Mozilla - NSS version < 3.68.1

CVSS3 Score: 9.8 - CRITICAL

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW NONE NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED HIGH HIGH HIGH

CVSS2 Score: 7.5 - HIGH

Access
Vector
Access
Complexity
Authentication
NETWORK LOW NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL PARTIAL PARTIAL

CVE References

Description Tags Link
CVE-2021-43527 Libnss Vulnerability in NetApp Products | NetApp Product Security security.netapp.com
text/html
URL Logo CONFIRM security.netapp.com/advisory/ntap-20211229-0002/
Oracle Critical Patch Update Advisory - April 2022 www.oracle.com
text/html
URL Logo MISC www.oracle.com/security-alerts/cpuapr2022.html
Access Denied bugzilla.mozilla.org
text/html
URL Logo MISC bugzilla.mozilla.org/show_bug.cgi?id=1737470
Memory corruption in NSS via DER-encoded DSA and RSA-PSS signatures — Mozilla www.mozilla.org
text/html
URL Logo MISC www.mozilla.org/security/advisories/mfsa2021-51/
Directory Listing: /pub/security/nss/releases/NSS_3_73_RTM/ ftp.mozilla.org
text/html
URL Logo MISC ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/
Directory Listing: /pub/security/nss/releases/NSS_3_68_1_RTM/ ftp.mozilla.org
text/html
URL Logo MISC ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/
cert-portal.siemens.com
application/pdf
URL Logo CONFIRM cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf
CVE-2021-43527 NSS heap overflow in StarWind products www.starwindsoftware.com
text/html
URL Logo MISC www.starwindsoftware.com/security/sw-20220802-0001/
Mozilla Network Security Service (NSS): Multiple Vulnerabilities (GLSA 202212-05) — Gentoo security security.gentoo.org
text/html
URL Logo GENTOO GLSA-202212-05

Related QID Numbers

  • 159543 Oracle Enterprise Linux Security Update for nss (ELSA-2021-4903)
  • 159544 Oracle Enterprise Linux Security Update for nss (ELSA-2021-4904)
  • 159569 Oracle Enterprise Linux Security Update for nss (ELSA-2021-9591)
  • 178920 Debian Security Update for nss (DSA 5016-1)
  • 178921 Debian Security Update for nss (DLA 2836-1)
  • 178931 Debian Security Update for nss (DLA 2836-2)
  • 198590 Ubuntu Security Notification for Thunderbird Vulnerability (USN-5168-2)
  • 198591 Ubuntu Security Notification for NSS Vulnerability (USN-5168-1)
  • 239921 Red Hat Update for nss (RHSA-2021:4904)
  • 239922 Red Hat Update for nss (RHSA-2021:4903)
  • 239923 Red Hat Update for nss (RHSA-2021:4909)
  • 239924 Red Hat Update for nss (RHSA-2021:4919)
  • 239930 Red Hat Update for thunderbird (RHSA-2021:4954)
  • 239931 Red Hat Update for nss (RHSA-2021:4953)
  • 257135 CentOS Security Update for nss (CESA-2021:4904)
  • 282094 Fedora Security Update for nss (FEDORA-2021-d0be347892)
  • 282125 Fedora Security Update for nss (FEDORA-2021-d8e9f6222a)
  • 296061 Oracle Solaris 11.4 Support Repository Update (SRU) 42.113.1 Missing (CPUJAN2022)
  • 353043 Amazon Linux Security Advisory for nss : ALAS-2021-1552
  • 353044 Amazon Linux Security Advisory for nss, nss-util, nss-softokn, nspr : ALAS2-2021-1722
  • 353096 Amazon Linux Security Advisory for nss : AL2012-2021-357
  • 354422 Amazon Linux Security Advisory for nss : ALAS2022-2022-223
  • 354451 Amazon Linux Security Advisory for nss : ALAS2022-2021-002
  • 354534 Amazon Linux Security Advisory for nss : ALAS-2022-223
  • 376265 LibreOffice check for Memory corruption via DER-encoded DSA and Rivest-Shamir-Adleman (RSA)-PSS (CVE-2021-43527)
  • 376930 Alibaba Cloud Linux Security Update for nss (ALINUX3-SA-2021:0081)
  • 376947 Alibaba Cloud Linux Security Update for nss (ALINUX2-SA-2021:0070)
  • 390251 Oracle Managed Virtualization (VM) Server for x86 Security Update for nss (OVMSA-2021-0040)
  • 500460 Alpine Linux Security Update for nss
  • 501646 Alpine Linux Security Update for nss
  • 502128 Alpine Linux Security Update for nss
  • 502319 Alpine Linux Security Update for nss
  • 591224 Siemens RUGGEDCOM ROX products Remote Code Execution (RCE) and Denial of Service (DoS) Vulnerability (SSA-594438)
  • 671355 EulerOS Security Update for nss (EulerOS-SA-2022-1278)
  • 671366 EulerOS Security Update for nss (EulerOS-SA-2022-1310)
  • 671371 EulerOS Security Update for nss (EulerOS-SA-2022-1294)
  • 671484 EulerOS Security Update for nss (EulerOS-SA-2022-1468)
  • 671532 EulerOS Security Update for nss (EulerOS-SA-2022-1477)
  • 690727 Free Berkeley Software Distribution (FreeBSD) Security Update for nss (47695a9c-5377-11ec-8be6-d4c9ef517024)
  • 690729 Free Berkeley Software Distribution (FreeBSD) Security Update for nss (47695a9c-5377-11ec-8be6-d4c9ef517024)
  • 710692 Gentoo Linux Mozilla Network Security Service (NSS) Multiple Vulnerabilities (GLSA 202212-05)
  • 730371 McAfee Web Gateway Multiple Vulnerabilities (WP-3335,WP-4131,WP-4159,WP-4237,WP-4259,WP-4329,WP-4348,WP-4355,WP-4376,WP-4407,WP-4421)
  • 751449 SUSE Enterprise Linux Security Update for mozilla-nss (SUSE-SU-2021:3934-1)
  • 751453 SUSE Enterprise Linux Security Update for mozilla-nss (SUSE-SU-2021:3939-1)
  • 751464 OpenSUSE Security Update for mozilla-nss (openSUSE-SU-2021:3934-1)
  • 752379 SUSE Enterprise Linux Security Update for mozilla-nspr, mozilla-nss (SUSE-SU-2022:2536-1)
  • 752380 SUSE Enterprise Linux Security Update for mozilla-nss (SUSE-SU-2022:2533-1)
  • 752409 SUSE Enterprise Linux Security Update for mozilla-nss (SUSE-SU-2022:2595-1)
  • 900336 Common Base Linux Mariner (CBL-Mariner) Security Update for nss (7020)
  • 900957 Common Base Linux Mariner (CBL-Mariner) Security Update for nss (7024-1)
  • 940321 AlmaLinux Security Update for nss (ALSA-2021:4903)
  • 960047 Rocky Linux Security Update for nss (RLSA-2021:4903)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationMozillaNssAllAllAllAll
ApplicationMozillaNss EsrAllAllAllAll
ApplicationNetappCloud Backup-AllAllAll
ApplicationNetappE-series Santricity Os ControllerAllAllAllAll
ApplicationOracleCommunications Cloud Native Core Binding Support Function1.11.0AllAllAll
ApplicationOracleCommunications Cloud Native Core Network Repository Function1.15.0AllAllAll
ApplicationOracleCommunications Cloud Native Core Network Repository Function1.15.1AllAllAll
ApplicationOracleCommunications Cloud Native Core Network Slice Selection Function1.8.0AllAllAll
ApplicationOracleCommunications Policy Management12.6.0.0.0AllAllAll
ApplicationStarwindsoftwareStarwind San Nasv8r13AllAllAll
ApplicationStarwindsoftwareStarwind Virtual Sanv8r1314398AllAll
  • cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:*:
  • cpe:2.3:a:mozilla:nss_esr:*:*:*:*:*:*:*:*:
  • cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*:
  • cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*:
  • cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*:
  • cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*:
  • cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*:
  • cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*:
  • cpe:2.3:a:oracle:communications_policy_management:12.6.0.0.0:*:*:*:*:*:*:*:
  • cpe:2.3:a:starwindsoftware:starwind_san_\&_nas:v8r13:*:*:*:*:*:*:*:
  • cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8r13:14398:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @oss_security CVE-2021-43527: Heap overflow in NSS when verifying DSA/RSA-PSS DER-encoded signatures: Posted by Dennis Jackson on… twitter.com/i/web/status/1… 2021-12-01 18:09:33
Twitter Icon @oss_security Re: CVE-2021-43527: Heap overflow in NSS when verifying DSA/RSA-PSS DER-encoded signatures: Posted by Alan Coopersm… twitter.com/i/web/status/1… 2021-12-01 18:09:34
Twitter Icon @oss_security Re: CVE-2021-43527: Heap overflow in NSS when verifying DSA/RSA-PSS DER-encoded signatures: Posted by Kai Engert on… twitter.com/i/web/status/1… 2021-12-01 18:09:36
Twitter Icon @makopicut CVE-2021-43527 A remote code execution flaw was found in the way NSS verifies certificates. access.redhat.com/security/cve/C… 2021-12-01 18:21:45
Twitter Icon @makopicut RHSB-2021-008 NSS Memory corruption when decoding DSA signatures (CVE-2021-43527) access.redhat.com/security/vulne… twitter.com/makopicut/stat… 2021-12-01 18:30:47
Twitter Icon @__kokumoto Mozillaがクロスプラットフォームの暗号ライブラリ(NSS)の致命的不具合(CVE-2021-43527)を修正。ヒープベースのバッファオーバーフローで、EメールやPDFのDERエンコードされたDSAまたはRSA-PSS署名を… twitter.com/i/web/status/1… 2021-12-02 03:36:50
Twitter Icon @therealpires "(...) CVE-2021-43527, and is resolved in NSS 3.73.0. If you are a vendor that distributes NSS in your products, yo… twitter.com/i/web/status/1… 2021-12-02 09:53:25
Twitter Icon @OpenBSD_ports OPENBSD_7_0 [email protected] changed security/nss: security/nss: backport fixes for CVE-2021-43527 on top of 3.70. cf… twitter.com/i/web/status/1… 2021-12-02 10:25:17
Twitter Icon @OpenBSD_stable OPENBSD_7_0 [email protected] changed security/nss: security/nss: backport fixes for CVE-2021-43527 on top of 3.70. cf… twitter.com/i/web/status/1… 2021-12-02 10:25:17
Twitter Icon @abclinuxu Bezpečnostní chyba CVE-2021-43527 v Network Security Services (NSS) abclinuxu.cz/zpravicky/bezp… 2021-12-02 13:03:13
Twitter Icon @Har_sia CVE-2021-43527 har-sia.info/CVE-2021-43527… #HarsiaInfo 2021-12-02 15:02:08
Twitter Icon @adminahead Critical Bug in Mozilla's NSS Crypto Library Potentially Affects Several Other Software. Tracked as CVE-2021-43527,… twitter.com/i/web/status/1… 2021-12-02 16:00:27
Twitter Icon @josejtax Registrado como CVE-2021-43527 afecta a las versiones NSS anteriores a 3.73 o 3.68.1 2021-12-02 17:50:00
Twitter Icon @thehackbr Vulnerabilidade crítica (CVE-2021-43527) em biblioteca de criptografia NSS afeta vários softwares e aplicações popu… twitter.com/i/web/status/1… 2021-12-02 18:00:02
Twitter Icon @Har_sia CVE-2021-43527 har-sia.info/CVE-2021-43527… #HarsiaInfo 2021-12-02 18:25:02
Twitter Icon @ohhara_shiojiri Oracle Linux update package > linux.oracle.com | CVE-2021-43527 linux.oracle.com/cve/CVE-2021-4… 2021-12-03 01:30:52
Twitter Icon @the_yellow_fall CVE-2021-43527: Mozilla Network Security Services Buffer Heap Overflow Vulnerability securityonline.info/cve-2021-43527…twitter.com/i/web/status/1… 2021-12-03 02:21:14
Twitter Icon @AcooEdi CVE-2021-43527: Mozilla Network Security Services Buffer Heap Overflow Vulnerability dlvr.it/SDfWcJ https://t.co/FmUDjoge5Q 2021-12-03 02:27:04
Twitter Icon @securezoo Mozilla patches Critical memory corruption vulnerability CVE-2021-43527 in Network Security Services (NSS)… twitter.com/i/web/status/1… 2021-12-03 16:06:39
Twitter Icon @MisakiWorld >両方の新バージョンは、CVE-2021-43527を解決するため、修正されたNSS 3.73.0暗号化ライブラリが含まれています(以前のバージョンからの変更点は、nssのセキュリティ修正のみです)。 2021-12-06 14:59:32
Twitter Icon @qdtgujkol 今回は脆弱性"CVE-2021-43527"の修正のみが含まれる緊急アップデート 7.1系列→11月30日にサポートは終了しているが、前述の脆弱性を受けて急遽7.1.8をリリース 7.2系列→来年1月リリース予定の7.2.4を同… twitter.com/i/web/status/1… 2021-12-07 03:17:12
Twitter Icon @ottoto2017 #CentOS 7.9.2009 の nss がupdate。CVE-2021-43527に対応。 #脆弱性 https://t.co/T8N1gr8Qjd 2021-12-07 05:41:51
Twitter Icon @buaqbot WHY fuzzers MISSED this buffer-overflow in Mozilla NSS library? ?‍♂️ (CVE-2021-43527 explained)… twitter.com/i/web/status/1… 2021-12-08 10:52:52
Twitter Icon @CVEreport CVE-2021-43527 : NSS Network Security Services versions prior to 3.73 or 3.68.1 ESR are vulnerable to a heap over… twitter.com/i/web/status/1… 2021-12-08 22:11:12
Reddit Logo Icon /r/opensource LibreOffice blog : LibreOffice 7.2.4 Community and LibreOffice 7.1.8 Community available ahead of schedule to provide an important security fix 2021-12-06 12:24:20
Reddit Logo Icon /r/freesoftware LibreOffice blog : LibreOffice 7.2.4 Community and LibreOffice 7.1.8 Community available ahead of schedule to provide an important security fix 2021-12-06 12:29:45
Reddit Logo Icon /r/software LibreOffice blog : LibreOffice 7.2.4 Community and LibreOffice 7.1.8 Community (for Windows, MacOS and Linux) available ahead of schedule to provide an important security fix 2021-12-06 14:30:53
Reddit Logo Icon /r/netcve CVE-2021-43527 2021-12-08 22:38:27
Reddit Logo Icon /r/nutanix AOS 5.20.3 available! 2022-01-25 08:34:08
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