NULL pointer dereference in Mozilla NSS
Priority LOW 33CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 fixed, 5 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
In Network Security Services (NSS) before 3.36.7 and before 3.41.1, a malformed signature can cause a crash due to a null dereference, resulting in a Denial of Service.
Why it matters now
EPSS 0.01971 80th percentileScored 2026-11-07
Fix Partial NSS (Mozilla): 3.41.1, 3.36.7Red Hat: 1 advisoryRed Hat: 1 fixed, 5 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 |
|---|---|---|---|---|---|
| Mozilla | NSS | before 3.41.1; before 3.36.7 | 3.41.1, 3.36.7 | Patch available | CNA |
- NSS VendorMozilla Affected before 3.41.1; before 3.36.7 Fixed in 3.41.1, 3.36.7 Patch available CNA
CPE configurations NVD · 17
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:* | before 3.36.7; 3.41 to before 3.41.1 | Vulnerable | Mozilla |
| cpe:2.3:o:siemens:ruggedcom_rox_mx5000_firmware:*:*:*:*:*:*:*:* | before 2.14.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:ruggedcom_rox_mx5000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:ruggedcom_rox_rx1400_firmware:*:*:*:*:*:*:*:* | before 2.14.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:ruggedcom_rox_rx1400:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:ruggedcom_rox_rx1500_firmware:*:*:*:*:*:*:*:* | before 2.14.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:ruggedcom_rox_rx1500:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:ruggedcom_rox_rx1501_firmware:*:*:*:*:*:*:*:* | before 2.14.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:ruggedcom_rox_rx1501:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:ruggedcom_rox_rx1510_firmware:*:*:*:*:*:*:*:* | before 2.14.0 | Vulnerable | Siemens |
- cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:* Versions before 3.36.7; 3.41 to before 3.41.1 Vulnerable ·Mozilla
- cpe:2.3:o:siemens:ruggedcom_rox_mx5000_firmware:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:ruggedcom_rox_mx5000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:ruggedcom_rox_rx1400_firmware:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:ruggedcom_rox_rx1400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:ruggedcom_rox_rx1500_firmware:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:ruggedcom_rox_rx1500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:ruggedcom_rox_rx1501_firmware:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:ruggedcom_rox_rx1501:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:ruggedcom_rox_rx1510_firmware:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·Siemens
Show 7 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:siemens:ruggedcom_rox_rx1510:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:ruggedcom_rox_rx1511_firmware:*:*:*:*:*:*:*:* | before 2.14.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:ruggedcom_rox_rx1511:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:ruggedcom_rox_rx1512_firmware:*:*:*:*:*:*:*:* | before 2.14.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:ruggedcom_rox_rx1512:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:ruggedcom_rox_rx5000_firmware:*:*:*:*:*:*:*:* | before 2.14.0 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:ruggedcom_rox_rx5000:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:h:siemens:ruggedcom_rox_rx1510:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:ruggedcom_rox_rx1511_firmware:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:ruggedcom_rox_rx1511:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:ruggedcom_rox_rx1512_firmware:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:ruggedcom_rox_rx1512:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:ruggedcom_rox_rx5000_firmware:*:*:*:*:*:*:*:* Versions before 2.14.0 Vulnerable ·Siemens
- cpe:2.3:h:siemens:ruggedcom_rox_rx5000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Remediation
- Fix · CNA NSS (Mozilla) Fixed in 3.41.1, 3.36.7
Red Hat 1 advisory
- RHSA-2019:1951 Released 2019-07-30 · Red Hat rating Moderatenss and nspr security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 8) nspr-4.21.0-2.el8_0, nspr-devel-4.21.0-2.el8_0, nss-3.44.0-7.el8_0 +9
Vendor assessments
Red Hat
Red Hat rating: Moderate. 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 Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Virtualization 4 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2019:1951 |
Timeline
- 2026-10-02 Threatist record created from CVE-2018-18508
- 2026-10-03 Alias added: GHSA-45r6-rwfw-29cq
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-2018-18508 · CVE Program
- CVE-2018-18508 · NVD
- FIRST EPSS
- GHSA-45r6-rwfw-29cq · GitHub Advisory Database · CC BY 4.0
- CVE-2018-18508 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences