Weakness (CWE)
CWE-476: NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
How to prevent it (5 mitigations)
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Implementation
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].
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Requirements
Select a programming language that is not susceptible to these issues.
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Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
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Architecture and Design
Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.
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Implementation
Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
Source: MITRE CWE-476
746 results · Clear filters · Feed
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High 7.5
NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer
Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required va…
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High 7.4
Deference after null check in as_rrc
NULL pointer dereference vulnerability in ASR Crane，Falcon on Linux (as_rrc module) allows Pointer Manipulation. This vulnerability is associated with program file 3g.mod/lib/src/urrsir.c.
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High 7.5
Envoy ext_authz: request `:path` pseudoheader dereferenced w/o null check
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's ext_authz filter assumes that a request contains a :path pseudoheader when applying query_parameters_to_set or query_p…
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High 7.5
Control iD iDSecure Unauthenticated Denial of Service
Control iD iDSecure versions prior to 4.8.3.0 are affected by an unauthenticated Denial of Service. The /api/dguardintegration/dguardVersion endpoint dereferences DGuard integration login state that may be unset, raising an unhandled null reference exception.…
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High 7.5
Unauthenticated remote crash of named via a single DoH SIG(0) request
An attacker can cause `named` to abort by sending a crafted DNS-over-HTTPS request with a cryptographically invalid SIG(0) record, and then closing the transport connection prematurely. This issue affects BIND 9 versions 9.20.0 through 9.20.27, 9.21.0 through…
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High 7.5
A Null Pointer Dereference in the mk_sched_event_close function (mk_server/mk_scheduler.c) of Monkey through commit 4fb…
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High 7.5
NULL pointer dereference in Zephyr MQTT-SN client when removing a non-responsive gateway
The MQTT-SN client keepalive handler process_ping() in subsys/net/lib/mqtt_sn/mqtt_sn.c removes the gateway record after PINGREQ retries are exhausted. It invoked SYS_SLIST_PEEK_HEAD_CONTAINER(&client->gateways, gw, next) but discarded the result. That macro …
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High 7.5
strongSwan 4.2.0 through 6.0.7 has a NULL pointer dereference in the x509 plugin's attribute certificate parser.
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High 7.5
Suricata lua/tls: null dereference in TlsGetCertInfo
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to version 7.0.16, the Lua TLS certificate information helper could dereference NULL certificate fields when a Lua script requested cer…
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High 8.8
Microsoft Office Word Remote Code Execution Vulnerability
Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
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High 7.5
Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability
Null pointer dereference in Windows IKE Extension allows an unauthorized attacker to deny service over a network.
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High 7.1
Virtual Hard Disk (VHD) Miniport Driver Denial of Service Vulnerability
Null pointer dereference in Virtual Hard Disk (VHD) Miniport Driver allows an unauthorized attacker to deny service locally.
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High 7.5
Windows SMB Server Network Transport Driver (srvnet.sys) Denial of Service Vulnerability
Null pointer dereference in Windows SMB Server Network Transport Driver (srvnet.sys) allows an unauthorized attacker to deny service over a network.
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High 7.8
Windows Biometric Service Elevation of Privilege Vulnerability
Null pointer dereference in Windows Biometric Service allows an authorized attacker to elevate privileges locally.
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High 7.5
Windows Kerberos Denial of Service Vulnerability
Null pointer dereference in Windows Kerberos allows an unauthorized attacker to deny service over a network.
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High 7.5
Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability
Null pointer dereference in Windows IKE Extension allows an unauthorized attacker to deny service over a network.
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High 7.5
389-ds-base: 389-ds-base: pre-authentication null pointer dereference via paged results and use_one_backend control in op_shared_search
A flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACK…
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High 7.1
PassMark PerformanceTest, BurnInTest, and OSForensics Kernel Null Pointer Dereference via DirectIo64.sys IOCTL
PassMark PerformanceTest before 11.1 build 1012, BurnInTest before 11.1 build 1000, and OSForensics before 11.1 build 1016 contain an unauthenticated physical memory disclosure in DirectIo64.sys, reachable by unprivileged local users through a single IOCTL wi…
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High 7.5
An issue in Free5GC v.4.2.2 allows a remote attacker to cause a denial of service via the UPF component
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High 7.5
Gstreamer1-plugins-base: gstreamer: null/invalid-pointer dereference in gst_rtsp_message_parse_auth_credentials() when parsing a crafted digest authorization/www-authenticate header
A NULL pointer dereference flaw was found in GStreamer's RTSP support library. The vulnerability occurs while parsing an Authorization or WWW-Authenticate header that uses Digest authentication. Specially crafted whitespace placement around a parameter's term…
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High 7.5
NGINX ngx_http_js_module vulnerability
A vulnerability exists in NGINX JavaScript where a malformed HTTP response received by ngx.fetch() can crash an NGINX worker when trusted JavaScript reads Response.statusText. Exploitation requires control or influence over the fetched HTTP response. Impact: …
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High 7.7
MongoDB Connector for BI Improper Error Handling During Schema Sampling May Cause Loss of SQL Service
A database user able to create a view in a namespace that MongoDB Connector for BI samples can cause the schema-sampling routine to stop functioning by defining a view whose evaluation reliably fails. The sampling logic classifies the resulting server message…
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High 7.5
A NULL pointer dereference in the get_min_buffer_size function (/libswscale/slice.c) of FFmpeg N-122528-gdd2976b9e1 all…
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High 7.5
A NULL pointer dereference in the AMF NGAP Dispatcher component of free5gc v4.0.1 allows attackers to cause a Denial of…
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High 7.5
A NULL pointer dereference in the CDR processing path of free5gc v4.0.1 allows attackers to cause a Denial of Service (…
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High 7.5
A NULL pointer dereference in the UDMC registration handler component of free5gc v4.0.1 allows attackers to cause a Den…
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High 7.5
A null pointer dereference vulnerability exists in the server-side session management logic of ccoap 77f55c4b466e99327c…
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High 7.5
ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a null pointer dereference vulnerability in the coap_server_han…
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High 7.5
ccoap 77f55c4b466e99327c24ace8a2913d3ba7e2ccd5 contains a null pointer dereference vulnerability in the coap_dump_msg()…
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High 7.5
In Stomper 5e2741e when a client sends a SEND frame missing the destination header field, the server triggers a null po…
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High 8.2
NVIDIA DGX Spark contains a vulnerability in the system firmware, where a privileged attacker could be able to cause a …
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High 7.5
Invalid Pointer Dereference in CMP Server via Crafted protectionAlg
Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parameter was not NULL and not its ASN.1 type, before treating it as a PBMParameter. A crafted message can contain a parameter of a different type, which i…
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High 7.5
RPK Server Signature Algorithm Selection Can Dereference a Missing Certificate
Issue summary: In a server or client configuration with RFC7250 Raw Public Keys (RPKs) enabled, and only the private key (with no associated certificate) configured locally, a NULL pointer dereference may occur when the remote peer solicits raw public keys an…
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High 7.5
DrayTek VigorSwitch Multiple Models Pre-Authentication NULL Pointer Dereference via setget.cgi
Multiple DrayTek VigorSwitch models contain a pre-authentication null pointer dereference vulnerability in the setget.cgi interface. The vulnerability is caused by missing validation when the pass field is absent. A remote attacker can trigger this vulnerabil…
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High 7.5
kin-openapi openai3filter: nil-pointer panic in ConvertErrors on malformed multipart/form-data body enables unauthenticated DoS
kin-openapi is a Go project for handling OpenAPI files. From 0.10.0 until 0.141.0, openapi3filter.convertParseError in openapi3filter/validation_error_encoder.go dereferences e.Parameter.In without checking whether e.Parameter is nil. A malformed non-string s…
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High 7.1
Unauthenticated Denial of Service via Null Pointer Dereference in HTTP Request Parsing
A NULL pointer dereference vulnerability exists in the HTTP request parsing functionality of TL-MR6400 v7. An unauthenticated remote attacker can trigger the vulnerability by sending a specially crafted HTTP request containing a malformed session cookie head…
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High 7.5
Vulnerabilities in IBM AIX and PowerVM VIOS
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to a NULL pointer dereference.
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High 7.1
Unauthenticated Denial-of-Service Vulnerability in HTTP Service in TP-Link TL-MR100, TL-MR150, TL-MR6400 and Archer MR600
An unauthenticated denial-of-service vulnerability was identified in TP-Link TL-MR100 v3.2, TL-MR150 v3.2, TL-MR6400 v8.0 and Archer MR600 v2, due to improper handling of exceptional request conditions that may lead to a NULL pointer dereference. A remote at…
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High 7.5
NULL Pointer Dereference in Wireshark
X.509IF protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
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High 7.1
RTSP Null Pointer Dereference Denial-of-Service Vulnerability on TP-Link Tapo C100 and C101
Tapo C100/C101 V5 contains a null pointer dereference vulnerability in the RTSP service. An attacker on the local network can send specially crafted requests that cause the service to dereference an invalid pointer, resulting in a service crash and device reb…