nss: Handling of Netscape Certificate Sequences in CERT_DecodeCertPackage() may crash with a NULL deref leading to DoS
Published Oct 22, 2020
7.5
HIGHCVSS 3.1
EPSS 1.40%
Description
In Network Security Services before 3.44, a malformed Netscape Certificate Sequence can cause NSS to crash, resulting in a denial of service.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<3.44
- Version
Configuration 1
- < 3.44
Configuration 2
- < 2.14.0
Running on/with
- n/a
Configuration 3
- < 2.14.0
Running on/with
- n/a
Configuration 4
- < 2.14.0
Running on/with
- n/a
Configuration 5
- < 2.14.0
Running on/with
- n/a
Configuration 6
- < 2.14.0
Running on/with
- n/a
Configuration 7
- < 2.14.0
Running on/with
- n/a
Configuration 8
- < 2.14.0
Running on/with
- n/a
Configuration 9
- < 2.14.0
Running on/with
- n/a
No data.
Red Hat Enterprise Linux 6
nspr-0:4.21.0-1.el6_10
Fixed · RHEA-2019:3280
Red Hat Enterprise Linux 6
nss-0:3.44.0-7.el6_10
Fixed · RHEA-2019:3280
Red Hat Enterprise Linux 6
nss-softokn-0:3.44.0-5.el6_10
Fixed · RHEA-2019:3280
Red Hat Enterprise Linux 6
nss-util-0:3.44.0-1.el6_10
Fixed · RHEA-2019:3280
Red Hat Enterprise Linux 7
nspr-0:4.21.0-1.el7
Fixed · RHSA-2019:2237
Red Hat Enterprise Linux 7
nss-0:3.44.0-4.el7
Fixed · RHSA-2019:2237
Red Hat Enterprise Linux 7
nss-softokn-0:3.44.0-5.el7
Fixed · RHSA-2019:2237
Red Hat Enterprise Linux 7
nss-util-0:3.44.0-3.el7
Fixed · RHSA-2019:2237
Red Hat Enterprise Linux 7.6 Extended Update Support
nss-0:3.36.0-9.el7_6
Fixed · RHSA-2021:0876
Red Hat Enterprise Linux 7.6 Extended Update Support
nss-softokn-0:3.36.0-7.el7_6
Fixed · RHSA-2021:0876
Red Hat Enterprise Linux 8
nspr-0:4.21.0-2.el8_0
Fixed · RHSA-2019:1951
Red Hat Enterprise Linux 8
nss-0:3.44.0-7.el8_0
Fixed · RHSA-2019:1951
Red Hat JBoss Enterprise Application Platform 6
nss
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | nspr-0:4.21.0-1.el6_10 | Fixed | RHEA-2019:3280 |
| Red Hat Enterprise Linux 6 | nss-0:3.44.0-7.el6_10 | Fixed | RHEA-2019:3280 |
| Red Hat Enterprise Linux 6 | nss-softokn-0:3.44.0-5.el6_10 | Fixed | RHEA-2019:3280 |
| Red Hat Enterprise Linux 6 | nss-util-0:3.44.0-1.el6_10 | Fixed | RHEA-2019:3280 |
| Red Hat Enterprise Linux 7 | nspr-0:4.21.0-1.el7 | Fixed | RHSA-2019:2237 |
| Red Hat Enterprise Linux 7 | nss-0:3.44.0-4.el7 | Fixed | RHSA-2019:2237 |
| Red Hat Enterprise Linux 7 | nss-softokn-0:3.44.0-5.el7 | Fixed | RHSA-2019:2237 |
| Red Hat Enterprise Linux 7 | nss-util-0:3.44.0-3.el7 | Fixed | RHSA-2019:2237 |
| Red Hat Enterprise Linux 7.6 Extended Update Support | nss-0:3.36.0-9.el7_6 | Fixed | RHSA-2021:0876 |
| Red Hat Enterprise Linux 7.6 Extended Update Support | nss-softokn-0:3.36.0-7.el7_6 | Fixed | RHSA-2021:0876 |
| Red Hat Enterprise Linux 8 | nspr-0:4.21.0-2.el8_0 | Fixed | RHSA-2019:1951 |
| Red Hat Enterprise Linux 8 | nss-0:3.44.0-7.el8_0 | Fixed | RHSA-2019:1951 |
| Red Hat JBoss Enterprise Application Platform 6 | nss | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue was addressed via upstream nss-3.44, which is already shipped with Red Hat Enterprise Linux 6, 7 and 8.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
2021-2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (10 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 1.40% (0.01399) | 71.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.38% (0.01382) | 68.50th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.28% (0.00276) | 49.01th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.21% (0.00215) | 60.44th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.21% (0.00215) | 58.85th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00156) | 50.17th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.29% (0.01294) | 30.79th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.29% (0.01294) | 0.00th | v1 |
References (8)
- https://access.redhat.com/security/cve/CVE-2019-17007 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1533216 x_refsource_MISCExploitIssue TrackingPatchVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1703979 Issue Tracking
- https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf x_refsource_CONFIRMThird Party Advisory
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.44_release_notes x_refsource_MISCRelease NotesVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-17007
- https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04 x_refsource_MISCThird Party AdvisoryUS Government Resource
- https://www.cve.org/CVERecord?id=CVE-2019-17007
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2019-17007 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1533216 | x_refsource_MISCExploitIssue TrackingPatchVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1703979 | Issue Tracking | |
| https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf | x_refsource_CONFIRMThird Party Advisory | |
| https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.44_release_notes | x_refsource_MISCRelease NotesVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-17007 | ||
| https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04 | x_refsource_MISCThird Party AdvisoryUS Government Resource | |
| https://www.cve.org/CVERecord?id=CVE-2019-17007 |
Change history (0)
No recorded changes yet.