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Vulnerability details: VCID-6jzj-cgtw-aaak
Vulnerability ID VCID-6jzj-cgtw-aaak
Aliases CVE-2021-43527
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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-787 Out-of-bounds Write
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
System Score Found at
rhas Critical https://access.redhat.com/errata/RHSA-2021:4903
rhas Critical https://access.redhat.com/errata/RHSA-2021:4904
rhas Critical https://access.redhat.com/errata/RHSA-2021:4907
rhas Critical https://access.redhat.com/errata/RHSA-2021:4909
rhas Critical https://access.redhat.com/errata/RHSA-2021:4919
rhas Critical https://access.redhat.com/errata/RHSA-2021:4932
rhas Critical https://access.redhat.com/errata/RHSA-2021:4933
rhas Critical https://access.redhat.com/errata/RHSA-2021:4946
rhas Critical https://access.redhat.com/errata/RHSA-2021:4953
rhas Critical https://access.redhat.com/errata/RHSA-2021:4954
rhas Critical https://access.redhat.com/errata/RHSA-2021:4969
rhas Critical https://access.redhat.com/errata/RHSA-2021:4994
rhas Critical https://access.redhat.com/errata/RHSA-2021:5006
rhas Critical https://access.redhat.com/errata/RHSA-2021:5035
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-43527.json
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00756 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
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epss 0.00906 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00906 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00906 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.00906 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
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epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05243 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05267 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05267 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05267 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05267 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05267 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.0538 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05404 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.05404 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
epss 0.2255 https://api.first.org/data/v1/epss?cve=CVE-2021-43527
rhbs urgent https://bugzilla.redhat.com/show_bug.cgi?id=2024370
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-43527
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2021-43527
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2021-43527
archlinux High https://security.archlinux.org/AVG-2596
archlinux High https://security.archlinux.org/AVG-2597
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2021-51
cvssv3.1 5.3 https://www.oracle.com/security-alerts/cpuapr2022.html
generic_textual MODERATE https://www.oracle.com/security-alerts/cpuapr2022.html
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-43527.json
https://api.first.org/data/v1/epss?cve=CVE-2021-43527
https://bugzilla.mozilla.org/show_bug.cgi?id=1737470
https://cert-portal.siemens.com/productcert/pdf/ssa-594438.pdf
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43527
https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_68_1_RTM/
https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_73_RTM/
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://security.gentoo.org/glsa/202212-05
https://security.netapp.com/advisory/ntap-20211229-0002/
https://www.mozilla.org/security/advisories/mfsa2021-51/
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.starwindsoftware.com/security/sw-20220802-0001/
2024370 https://bugzilla.redhat.com/show_bug.cgi?id=2024370
ASA-202112-3 https://security.archlinux.org/ASA-202112-3
ASA-202112-4 https://security.archlinux.org/ASA-202112-4
AVG-2596 https://security.archlinux.org/AVG-2596
AVG-2597 https://security.archlinux.org/AVG-2597
cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:nss_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:nss_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=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:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=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:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=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:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=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:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=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:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_policy_management:12.6.0.0.0:*:*:*:*:*:*:*
cpe:2.3:a:starwindsoftware:starwind_san_\&_nas:v8r13:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:starwindsoftware:starwind_san_\&_nas:v8r13:*:*:*:*:*:*:*
cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8r13:14398:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:starwindsoftware:starwind_virtual_san:v8r13:14398:*:*:*:*:*:*
CVE-2021-43527 https://nvd.nist.gov/vuln/detail/CVE-2021-43527
mfsa2021-51 https://www.mozilla.org/en-US/security/advisories/mfsa2021-51
RHSA-2021:4903 https://access.redhat.com/errata/RHSA-2021:4903
RHSA-2021:4904 https://access.redhat.com/errata/RHSA-2021:4904
RHSA-2021:4907 https://access.redhat.com/errata/RHSA-2021:4907
RHSA-2021:4909 https://access.redhat.com/errata/RHSA-2021:4909
RHSA-2021:4919 https://access.redhat.com/errata/RHSA-2021:4919
RHSA-2021:4932 https://access.redhat.com/errata/RHSA-2021:4932
RHSA-2021:4933 https://access.redhat.com/errata/RHSA-2021:4933
RHSA-2021:4946 https://access.redhat.com/errata/RHSA-2021:4946
RHSA-2021:4953 https://access.redhat.com/errata/RHSA-2021:4953
RHSA-2021:4954 https://access.redhat.com/errata/RHSA-2021:4954
RHSA-2021:4969 https://access.redhat.com/errata/RHSA-2021:4969
RHSA-2021:4994 https://access.redhat.com/errata/RHSA-2021:4994
RHSA-2021:5006 https://access.redhat.com/errata/RHSA-2021:5006
RHSA-2021:5035 https://access.redhat.com/errata/RHSA-2021:5035
USN-5168-1 https://usn.ubuntu.com/5168-1/
USN-5168-2 https://usn.ubuntu.com/5168-2/
USN-5168-3 https://usn.ubuntu.com/5168-3/
USN-5168-4 https://usn.ubuntu.com/5168-4/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-43527.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-43527
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-43527
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-43527
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Found at https://www.oracle.com/security-alerts/cpuapr2022.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.81483
EPSS Score 0.00756
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.