CVE-2018-18508

nss: NULL pointer dereference in several CMS functions resulting in a denial of service

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

En Network Security Services (NSS) versiones anteriores a 3.36.7 y versiones anteriores a 3.41.1, una firma malformada puede causar un bloqueo debido a una desreferencia de null, resultando en una Denegación de Servicio

USN-3898-1 fixed a vulnerability in NSS. This update provides the corresponding update for Ubuntu 12.04 ESM. Hanno BAPck and Damian Poddebniak discovered that NSS incorrectly handled certain CMS functions. A remote attacker could possibly use this issue to cause NSS to crash, resulting in a denial of service. Various other issues were also addressed.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-10-19 CVE Reserved
2019-02-27 CVE Published
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (6)

URL	Tag	Source
https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf	Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.36.7_release_notes	2021-02-18
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.41.1_release_notes	2021-02-18
https://access.redhat.com/security/cve/CVE-2018-18508	2019-07-30
https://bugzilla.redhat.com/show_bug.cgi?id=1671310	2019-07-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Siemens Search vendor "Siemens"	Ruggedcom Rox Mx5000 Firmware Search vendor "Siemens" for product "Ruggedcom Rox Mx5000 Firmware"	< 2.14.0 Search vendor "Siemens" for product "Ruggedcom Rox Mx5000 Firmware" and version " < 2.14.0"	-	Affected	in	Siemens Search vendor "Siemens"	Ruggedcom Rox Mx5000 Search vendor "Siemens" for product "Ruggedcom Rox Mx5000"	-	-	Safe
Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1400 Firmware Search vendor "Siemens" for product "Ruggedcom Rox Rx1400 Firmware"	< 2.14.0 Search vendor "Siemens" for product "Ruggedcom Rox Rx1400 Firmware" and version " < 2.14.0"	-	Affected	in	Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1400 Search vendor "Siemens" for product "Ruggedcom Rox Rx1400"	-	-	Safe
Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1500 Firmware Search vendor "Siemens" for product "Ruggedcom Rox Rx1500 Firmware"	< 2.14.0 Search vendor "Siemens" for product "Ruggedcom Rox Rx1500 Firmware" and version " < 2.14.0"	-	Affected	in	Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1500 Search vendor "Siemens" for product "Ruggedcom Rox Rx1500"	-	-	Safe
Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1501 Firmware Search vendor "Siemens" for product "Ruggedcom Rox Rx1501 Firmware"	< 2.14.0 Search vendor "Siemens" for product "Ruggedcom Rox Rx1501 Firmware" and version " < 2.14.0"	-	Affected	in	Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1501 Search vendor "Siemens" for product "Ruggedcom Rox Rx1501"	-	-	Safe
Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1510 Firmware Search vendor "Siemens" for product "Ruggedcom Rox Rx1510 Firmware"	< 2.14.0 Search vendor "Siemens" for product "Ruggedcom Rox Rx1510 Firmware" and version " < 2.14.0"	-	Affected	in	Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1510 Search vendor "Siemens" for product "Ruggedcom Rox Rx1510"	-	-	Safe
Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1511 Firmware Search vendor "Siemens" for product "Ruggedcom Rox Rx1511 Firmware"	< 2.14.0 Search vendor "Siemens" for product "Ruggedcom Rox Rx1511 Firmware" and version " < 2.14.0"	-	Affected	in	Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1511 Search vendor "Siemens" for product "Ruggedcom Rox Rx1511"	-	-	Safe
Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1512 Firmware Search vendor "Siemens" for product "Ruggedcom Rox Rx1512 Firmware"	< 2.14.0 Search vendor "Siemens" for product "Ruggedcom Rox Rx1512 Firmware" and version " < 2.14.0"	-	Affected	in	Siemens Search vendor "Siemens"	Ruggedcom Rox Rx1512 Search vendor "Siemens" for product "Ruggedcom Rox Rx1512"	-	-	Safe
Siemens Search vendor "Siemens"	Ruggedcom Rox Rx5000 Firmware Search vendor "Siemens" for product "Ruggedcom Rox Rx5000 Firmware"	< 2.14.0 Search vendor "Siemens" for product "Ruggedcom Rox Rx5000 Firmware" and version " < 2.14.0"	-	Affected	in	Siemens Search vendor "Siemens"	Ruggedcom Rox Rx5000 Search vendor "Siemens" for product "Ruggedcom Rox Rx5000"	-	-	Safe
Mozilla Search vendor "Mozilla"		Network Security Services Search vendor "Mozilla" for product "Network Security Services"				< 3.36.7 Search vendor "Mozilla" for product "Network Security Services" and version " < 3.36.7"		-		Affected
Mozilla Search vendor "Mozilla"		Network Security Services Search vendor "Mozilla" for product "Network Security Services"				>= 3.41 < 3.41.1 Search vendor "Mozilla" for product "Network Security Services" and version " >= 3.41 < 3.41.1"		-		Affected