HIGH
nss: Null pointer dereference when handling empty SSLv2 messages
Published May 30, 2017
7.5
HIGHCVSS 3.0
EPSS 4.30%
Description
Null pointer dereference vulnerability in NSS since 3.24.0 was found when server receives empty SSLv2 messages resulting into denial of service by remote attacker.
Affected products
-
- Version since 3.24.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| NSS project | Nss | n/a |
|
OR
- 3.24.0
- 3.25.0
- 3.25.1
- 3.26.0
- 3.26.2
- 3.27.0
- 3.27.1
- 3.27.2
- 3.28.0
- 3.28.1
- 3.28.2
- 3.28.3
- 3.29.0
- 3.29.1
- 3.29.2
- 3.29.3
- 3.30.0
- 3.30.1
No data.
Red Hat Container Development Kit 3.0
n/a
Fixed · RHSA-2017:1567
Red Hat Enterprise Linux 6
nss-0:3.28.4-3.el6_9
Fixed · RHSA-2017:1364
Red Hat Enterprise Linux 7
nss-0:3.28.4-1.2.el7_3
Fixed · RHSA-2017:1365
Red Hat Enterprise Linux 5
nss
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Container Development Kit 3.0 | n/a | Fixed | RHSA-2017:1567 |
| Red Hat Enterprise Linux 6 | nss-0:3.28.4-3.el6_9 | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux 7 | nss-0:3.28.4-1.2.el7_3 | Fixed | RHSA-2017:1365 |
| Red Hat Enterprise Linux 5 | nss | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.30% 0.04302
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.04302
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (27 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.30% (0.04302) | 90.83th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.30% (0.04302) | 89.84th | v5 (v2026.06.15) |
| Feb 19, 2026 | 2.10% (0.02098) | 83.74th | v4 (v2025.03.14) |
| Nov 21, 2025 | 4.53% (0.04527) | 88.66th | v4 (v2025.03.14) |
| Nov 18, 2025 | 1.75% (0.01749) | 81.05th | v4 (v2025.03.14) |
| Aug 1, 2025 | 4.53% (0.04527) | 88.81th | v4 (v2025.03.14) |
| Jul 29, 2025 | 3.51% (0.03511) | 87.15th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.66% (0.01657) | 80.36th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.76% (0.04760) | 82.01th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.38% (0.01382) | 79.00th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.57% (0.02574) | 89.93th | v3 (v2023.03.01) |
| Dec 12, 2024 | 4.51% (0.04511) | 92.78th | v3 (v2023.03.01) |
| Jun 11, 2024 | 4.01% (0.04012) | 92.06th | v3 (v2023.03.01) |
| May 2, 2024 | 3.44% (0.03436) | 91.40th | v3 (v2023.03.01) |
| Mar 20, 2024 | 3.23% (0.03234) | 91.00th | v3 (v2023.03.01) |
| May 8, 2023 | 2.90% (0.02900) | 89.25th | v3 (v2023.03.01) |
| Mar 15, 2023 | 2.60% (0.02604) | 88.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.74% (0.02737) | 88.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.97% (0.01974) | 78.97th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.97% (0.01974) | 78.46th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.54% (0.01537) | 73.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.97% (0.01974) | 77.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.97% (0.01974) | 56.20th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.21% (0.03209) | 66.48th | v1 |
| Jan 6, 2022 | 3.21% (0.03209) | 66.16th | v1 |
| Sep 1, 2021 | 3.21% (0.03209) | 81.46th | v1 |
| Apr 14, 2021 | 3.21% (0.03209) | 0.00th | v1 |
Weaknesses (1)
References (13)
- http://www.debian.org/security/2017/dsa-3872 vendor-advisoryx_refsource_DEBIAN
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/98744 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038579 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/errata/RHSA-2017:1364 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:1365 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:1567 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2017:1712 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2017-7502 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1446631 Issue Tracking
- https://hg.mozilla.org/projects/nss/rev/55ea60effd0d x_refsource_CONFIRMPatch
- https://nvd.nist.gov/vuln/detail/CVE-2017-7502
- https://www.cve.org/CVERecord?id=CVE-2017-7502
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2017/dsa-3872 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html | x_refsource_CONFIRM | |
| http://www.securityfocus.com/bid/98744 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1038579 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/errata/RHSA-2017:1364 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/errata/RHSA-2017:1365 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/errata/RHSA-2017:1567 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/errata/RHSA-2017:1712 | vendor-advisoryx_refsource_REDHAT | |
| https://access.redhat.com/security/cve/CVE-2017-7502 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1446631 | Issue Tracking | |
| https://hg.mozilla.org/projects/nss/rev/55ea60effd0d | x_refsource_CONFIRMPatch | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-7502 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-7502 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published May 30, 2017
Updated Aug 5, 2024
Reserved Apr 5, 2017
Link CVE-2017-7502
CISA Vulnrichment
Updated n/a