Vulnerability CVE-2021-43527

Vulnerability Name:

CVE-2021-43527 (CCN-214347)

Assigned:

2021-12-01

Published:

2021-12-01

Updated:

2023-02-23

Summary:

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 Severity:

9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.8 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.8 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

9.8 Critical (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.8 High (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-120

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2021-43527

Source: CCN
Type: Google Security Research Issue 2237
nss: memory corruption validating dsa/rsa-pss signatures

Source: security@mozilla.org
Type: Issue Tracking, Permissions Required, Vendor Advisory
security@mozilla.org

Source: security@mozilla.org
Type: Third Party Advisory
security@mozilla.org

Source: CCN
Type: Mozilla Web site
NSS release notes

Source: XF
Type: UNKNOWN
mozilla-nss-cve202143527-bo(214347)

Source: security@mozilla.org
Type: Vendor Advisory
security@mozilla.org

Source: security@mozilla.org
Type: Vendor Advisory
security@mozilla.org

Source: CCN
Type: Packet Storm Security [12-01-2021]
NSS Signature Validation Memory Corruption

Source: CCN
Type: oss-sec Mailing List, Wed, 1 Dec 2021 16:43:46 +0000
CVE-2021-43527: Heap overflow in NSS when verifying DSA/RSA-PSS DER-encoded signatures

Source: CCN
Type: oss-sec Mailing List, Wed, 1 Dec 2021 09:11:15 -0800
Re: CVE-2021-43527: Heap overflow in NSS when verifying DSA/RSA-PSS DER-encoded signatures

Source: CCN
Type: oss-sec Mailing List, Wed, 1 Dec 2021 18:37:27 +0100
Re: CVE-2021-43527: Heap overflow in NSS when verifying DSA/RSA-PSS DER-encoded signatures

Source: security@mozilla.org
Type: Third Party Advisory
security@mozilla.org

Source: security@mozilla.org
Type: Third Party Advisory
security@mozilla.org

Source: CCN
Type: IBM Security Bulletin 6568365 (QRadar Network Packet Capture)
IBM QRadar Network Packet Capture is using components with known vulnerabilities

Source: CCN
Type: IBM Security Bulletin 6587384 (Spectrum Protect Plus)
Heap-Based Buffer Overflow in Mozilla Network Security Services (NSS) may affect IBM Spectrum Protect Plus (CVE-2021-43527)

Source: CCN
Type: IBM Security Bulletin 6840945 (QRadar Network Security)
IBM QRadar Network Security is affected by multiple vulnerabilities.

Source: CCN
Type: Mozilla Foundation Security Advisory 2021-51
Memory corruption in NSS via DER-encoded DSA and RSA-PSS signatures

Source: security@mozilla.org
Type: Vendor Advisory
security@mozilla.org

Source: CCN
Type: Oracle CPUApr2022
Oracle Critical Patch Update Advisory - April 2022

Source: security@mozilla.org
Type: Patch, Third Party Advisory
security@mozilla.org

Source: security@mozilla.org
Type: Third Party Advisory
security@mozilla.org

Vulnerable Configuration:

Configuration RedHat 1:

cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

Configuration RedHat 2:

cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

Configuration RedHat 3:

cpe:/o:redhat:enterprise_linux:7:*:*:*:*:*:*:*

Configuration RedHat 4:

cpe:/o:redhat:enterprise_linux:7::client:*:*:*:*:*

Configuration RedHat 5:

cpe:/o:redhat:enterprise_linux:7::computenode:*:*:*:*:*

Configuration RedHat 6:

cpe:/o:redhat:enterprise_linux:7::server:*:*:*:*:*

Configuration RedHat 7:

cpe:/o:redhat:enterprise_linux:7::workstation:*:*:*:*:*

Configuration RedHat 8:

cpe:/o:redhat:rhel_els:6:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:ibm:qradar_network_security:5.4.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:qradar_network_security:5.5.0:*:*:*:*:*:*:*

OR cpe:/a:ibm:qradar_network_packet_capture:7.3:*:*:*:*:*:*:*

OR cpe:/a:ibm:spectrum_protect_plus:10.1.9.3:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:8008	P	gdb-12.1-150400.15.9.1 on GA media (Moderate)	2023-06-20
oval:org.opensuse.security:def:8071	P	xmlgraphics-commons-2.6-150200.3.4.3 on GA media (Moderate)	2023-06-20
oval:org.opensuse.security:def:7591	P	libfreebl3-3.79.4-150400.3.29.1 on GA media (Moderate)	2023-06-12
oval:org.opensuse.security:def:51993	P	Security update for tpm2-0-tss (Moderate) (in QA)	2023-01-23
oval:org.opensuse.security:def:43652	P	Security update for the Linux Kernel (Important)	2022-07-26
oval:org.opensuse.security:def:6104	P	Security update for mozilla-nspr, mozilla-nss (Moderate)	2022-07-22
oval:org.opensuse.security:def:125760	P	Security update for mozilla-nspr, mozilla-nss (Moderate)	2022-07-22
oval:org.opensuse.security:def:3721	P	Security update for java-1_8_0-openjdk (Important)	2022-07-22
oval:org.opensuse.security:def:127321	P	Security update for mozilla-nspr, mozilla-nss (Moderate)	2022-07-22
oval:org.opensuse.security:def:126924	P	Security update for mozilla-nspr, mozilla-nss (Moderate)	2022-07-22
oval:org.opensuse.security:def:5296	P	Security update for mozilla-nspr, mozilla-nss (Moderate)	2022-07-22
oval:org.opensuse.security:def:3539	P	kernel-firmware-20190618-5.11.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:3006	P	ant-1.9.4-3.3.1 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:94636	P	libfreebl3-3.68.3-150400.1.7 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:94651	P	libjson-c-devel-0.13-3.3.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:102172	P	Security update for protobuf (Moderate)	2022-03-30
oval:org.opensuse.security:def:100082	P	(Moderate)	2022-02-18
oval:org.opensuse.security:def:112632	P	libfreebl3-3.73-1.1 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:111157	P	Security update for mozilla-nss (Important)	2021-12-10
oval:org.opensuse.security:def:26181	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:51708	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:83366	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:42241	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:109445	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:73750	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:92423	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:100687	P	(Important)	2021-12-06
oval:org.opensuse.security:def:105868	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:8872	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:69569	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:101364	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:60432	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:89487	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:127202	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:31318	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:56102	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:85782	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:41577	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:95459	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:1648	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:106748	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:9822	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:70513	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:99436	P	(Important)	2021-12-06
oval:org.opensuse.security:def:111815	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:67341	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:99572	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:33751	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:58881	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:88229	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:29457	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:83486	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:38242	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:73932	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:92622	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:101551	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:106063	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:9067	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:69763	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:64628	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:98983	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:31716	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:57141	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:86180	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:117544	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:23720	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:45015	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:96089	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:108030	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:10183	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:92033	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:99699	P	(Important)	2021-12-06
oval:org.opensuse.security:def:69097	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:99771	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:34009	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:59574	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:88546	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:126805	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:30159	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:55280	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:84248	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:5168	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:39222	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:76068	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:92821	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:102224	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:106262	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:9429	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:69962	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:102779	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:5911	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:64810	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:99178	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:32234	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:57539	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:86698	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:118541	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:24005	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:46007	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:82664	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:42146	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:108838	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:10373	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:92228	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:100023	P	(Important)	2021-12-06
oval:org.opensuse.security:def:105673	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:8682	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:69160	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:34609	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:59832	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:89229	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:30279	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:55982	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:84706	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:40585	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:76409	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:820	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:106461	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:9623	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:70323	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:99165	P	(Important)	2021-12-06
oval:org.opensuse.security:def:6252	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:67000	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:99373	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:33058	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:58057	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:87522	P	Security update for mozilla-nss (Important)	2021-12-06
oval:org.opensuse.security:def:125638	P	Security update for mozilla-nss (Important)	2021-12-06
oval:com.redhat.rhsa:def:20214903	P	RHSA-2021:4903: nss security update (Critical)	2021-12-01
oval:com.redhat.rhsa:def:20214904	P	RHSA-2021:4904: nss security update (Critical)	2021-12-01
oval:com.redhat.rhsa:def:20214907	P	RHSA-2021:4907: nss security update (Critical)	2021-12-01

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