NULL pointer dereference in nss
Priority MEDIUM 40CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 17 fixed, 1 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
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.
Why it matters now
EPSS 0.04302 91st percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 17 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NSS project | nss | since 3.24.0 | — | No fix listed | CNA |
- nss VendorNSS project Affected since 3.24.0 Fixed in — No fix listed CNA
CPE configurations NVD · 18
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:network_security_services:3.24.0:*:*:*:*:*:*:* | 3.24.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.25.0:*:*:*:*:*:*:* | 3.25.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.25.1:*:*:*:*:*:*:* | 3.25.1 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.26.0:*:*:*:*:*:*:* | 3.26.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.26.2:*:*:*:*:*:*:* | 3.26.2 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.27.0:*:*:*:*:*:*:* | 3.27.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.27.1:*:*:*:*:*:*:* | 3.27.1 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.27.2:*:*:*:*:*:*:* | 3.27.2 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.28.0:*:*:*:*:*:*:* | 3.28.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.28.1:*:*:*:*:*:*:* | 3.28.1 | Vulnerable | Mozilla |
- cpe:2.3:a:mozilla:network_security_services:3.24.0:*:*:*:*:*:*:* Versions 3.24.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.25.0:*:*:*:*:*:*:* Versions 3.25.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.25.1:*:*:*:*:*:*:* Versions 3.25.1 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.26.0:*:*:*:*:*:*:* Versions 3.26.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.26.2:*:*:*:*:*:*:* Versions 3.26.2 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.27.0:*:*:*:*:*:*:* Versions 3.27.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.27.1:*:*:*:*:*:*:* Versions 3.27.1 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.27.2:*:*:*:*:*:*:* Versions 3.27.2 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.28.0:*:*:*:*:*:*:* Versions 3.28.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.28.1:*:*:*:*:*:*:* Versions 3.28.1 Vulnerable ·Mozilla
Show 8 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:network_security_services:3.28.2:*:*:*:*:*:*:* | 3.28.2 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.28.3:*:*:*:*:*:*:* | 3.28.3 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.29.0:*:*:*:*:*:*:* | 3.29.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.29.1:*:*:*:*:*:*:* | 3.29.1 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.29.2:*:*:*:*:*:*:* | 3.29.2 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.29.3:*:*:*:*:*:*:* | 3.29.3 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.30.0:*:*:*:*:*:*:* | 3.30.0 | Vulnerable | Mozilla |
| cpe:2.3:a:mozilla:network_security_services:3.30.1:*:*:*:*:*:*:* | 3.30.1 | Vulnerable | Mozilla |
- cpe:2.3:a:mozilla:network_security_services:3.28.2:*:*:*:*:*:*:* Versions 3.28.2 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.28.3:*:*:*:*:*:*:* Versions 3.28.3 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.29.0:*:*:*:*:*:*:* Versions 3.29.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.29.1:*:*:*:*:*:*:* Versions 3.29.1 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.29.2:*:*:*:*:*:*:* Versions 3.29.2 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.29.3:*:*:*:*:*:*:* Versions 3.29.3 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.30.0:*:*:*:*:*:*:* Versions 3.30.0 Vulnerable ·Mozilla
- cpe:2.3:a:mozilla:network_security_services:3.30.1:*:*:*:*:*:*:* Versions 3.30.1 Vulnerable ·Mozilla
Remediation
Red Hat 3 advisories
- RHSA-2017:1567 Released 2017-06-21 · Red Hat rating ImportantRed Hat Container Development Kit 3.0.0 security update
- Red Hat Container Development Kit 3.0
- RHSA-2017:1364 Released 2017-05-30 · Red Hat rating Importantnss security and bug fix update
- Red Hat Enterprise Linux Desktop (v. 6) nss-3.28.4-3.el6_9, nss-sysinit-3.28.4-3.el6_9, nss-tools-3.28.4-3.el6_9
- Red Hat Enterprise Linux Desktop Optional (v. 6) nss-devel-3.28.4-3.el6_9, nss-pkcs11-devel-3.28.4-3.el6_9
- Red Hat Enterprise Linux HPC Node (v. 6) nss-3.28.4-3.el6_9, nss-sysinit-3.28.4-3.el6_9, nss-tools-3.28.4-3.el6_9
- Red Hat Enterprise Linux HPC Node Optional (v. 6) nss-devel-3.28.4-3.el6_9, nss-pkcs11-devel-3.28.4-3.el6_9
- Red Hat Enterprise Linux Server (v. 6) nss-3.28.4-3.el6_9, nss-3.28.4-3.el6_9.ppc, nss-devel-3.28.4-3.el6_9 +3
- Red Hat Enterprise Linux Server Optional (v. 6) nss-pkcs11-devel-3.28.4-3.el6_9, nss-pkcs11-devel-3.28.4-3.el6_9.ppc
- Red Hat Enterprise Linux Workstation (v. 6) nss-3.28.4-3.el6_9, nss-devel-3.28.4-3.el6_9, nss-sysinit-3.28.4-3.el6_9 +1
- Red Hat Enterprise Linux Workstation Optional (v. 6) nss-pkcs11-devel-3.28.4-3.el6_9
- RHSA-2017:1365 Released 2017-05-30 · Red Hat rating Importantnss security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) nss-3.28.4-1.2.el7_3, nss-sysinit-3.28.4-1.2.el7_3, nss-tools-3.28.4-1.2.el7_3
- Red Hat Enterprise Linux Client Optional (v. 7) nss-devel-3.28.4-1.2.el7_3, nss-pkcs11-devel-3.28.4-1.2.el7_3
- Red Hat Enterprise Linux ComputeNode (v. 7) nss-3.28.4-1.2.el7_3, nss-sysinit-3.28.4-1.2.el7_3, nss-tools-3.28.4-1.2.el7_3
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) nss-devel-3.28.4-1.2.el7_3, nss-pkcs11-devel-3.28.4-1.2.el7_3
- Red Hat Enterprise Linux Server (v. 7) nss-3.28.4-1.2.el7_3, nss-3.28.4-1.2.el7_3.ppc, nss-devel-3.28.4-1.2.el7_3 +3
- Red Hat Enterprise Linux Server Optional (v. 7) nss-pkcs11-devel-3.28.4-1.2.el7_3, nss-pkcs11-devel-3.28.4-1.2.el7_3.ppc
- Red Hat Enterprise Linux Workstation (v. 7) nss-3.28.4-1.2.el7_3, nss-devel-3.28.4-1.2.el7_3, nss-sysinit-3.28.4-1.2.el7_3 +1
- Red Hat Enterprise Linux Workstation Optional (v. 7) nss-pkcs11-devel-3.28.4-1.2.el7_3
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat Container Development Kit 3.0 | Fixed | RHSA-2017:1567 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2017:1365 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2017:1365 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2017:1365 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2017:1365 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2017:1365 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2017:1365 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2017:1365 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2017:1364 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2017:1365 |
Timeline
- 2026-10-02 Threatist record created from CVE-2017-7502
- 2026-10-03 Alias added: GHSA-97vv-2xv8-266j
References
More Mozilla Network Security Services vulnerabilities
- TI-2015-03381 The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server… CVSS 3.1LOW 3.7
- TI-2007-00009 Stack-based buffer overflow in the SSLv2 support in Mozilla Network Security Services… CVSS 2.0MEDIUM 6.8
- TI-2018-08903 A cached side channel attack during handshakes using RSA encryption could allow for the… CVSS 3.0MEDIUM 5.9
- TI-2015-05957 Heap-based buffer overflow in the ASN.1 decoder in Mozilla Network Security Services… CVSS 3.0CRITICAL 9.8
- TI-2004-00763 Heap-based buffer overflow in Netscape Network Security Services (NSS) library allows… CVSS 2.0HIGH 7.5
- TI-2014-01197 Use-after-free vulnerability in the CERT_DestroyCertificate function in libnss3.so in… CVSS 2.0HIGH 10.0
Sources
- CVE-2017-7502 · CVE Program
- CVE-2017-7502 · NVD
- FIRST EPSS
- GHSA-97vv-2xv8-266j · GitHub Advisory Database · CC BY 4.0
- CVE-2017-7502 · Red Hat security data · CC BY 4.0
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