CWE-476

NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

CVE-2021-29583 (GCVE-0-2021-29583)

Vulnerability from cvelistv5 – Published: 2021-05-14 19:15 – Updated: 2024-08-03 22:11
VLAI
Title
Heap buffer overflow and undefined behavior in `FusedBatchNorm`
Summary
TensorFlow is an end-to-end open source platform for machine learning. The implementation of `tf.raw_ops.FusedBatchNorm` is vulnerable to a heap buffer overflow. If the tensors are empty, the same implementation can trigger undefined behavior by dereferencing null pointers. The implementation(https://github.com/tensorflow/tensorflow/blob/57d86e0db5d1365f19adcce848dfc1bf89fdd4c7/tensorflow/core/kernels/fused_batch_norm_op.cc) fails to validate that `scale`, `offset`, `mean` and `variance` (the last two only when required) all have the same number of elements as the number of channels of `x`. This results in heap out of bounds reads when the buffers backing these tensors are indexed past their boundary. If the tensors are empty, the validation mentioned in the above paragraph would also trigger and prevent the undefined behavior. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
tensorflow tensorflow Affected: < 2.1.4
Affected: >= 2.2.0, < 2.2.3
Affected: >= 2.3.0, < 2.3.3
Affected: >= 2.4.0, < 2.4.2
Create a notification for this product.
Show details on NVD website

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CVE-2021-29592 (GCVE-0-2021-29592)

Vulnerability from cvelistv5 – Published: 2021-05-14 19:22 – Updated: 2024-08-03 22:11
VLAI
Title
Null pointer dereference in TFLite's `Reshape` operator
Summary
TensorFlow is an end-to-end open source platform for machine learning. The fix for CVE-2020-15209(https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15209) missed the case when the target shape of `Reshape` operator is given by the elements of a 1-D tensor. As such, the fix for the vulnerability(https://github.com/tensorflow/tensorflow/blob/9c1dc920d8ffb4893d6c9d27d1f039607b326743/tensorflow/lite/core/subgraph.cc#L1062-L1074) allowed passing a null-buffer-backed tensor with a 1D shape. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
tensorflow tensorflow Affected: < 2.1.4
Affected: >= 2.2.0, < 2.2.3
Affected: >= 2.3.0, < 2.3.3
Affected: >= 2.4.0, < 2.4.2
Create a notification for this product.
Show details on NVD website

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CVE-2021-29616 (GCVE-0-2021-29616)

Vulnerability from cvelistv5 – Published: 2021-05-14 19:25 – Updated: 2024-08-03 22:11
VLAI
Title
Null dereference in Grappler's `TrySimplify`
Summary
TensorFlow is an end-to-end open source platform for machine learning. The implementation of TrySimplify(https://github.com/tensorflow/tensorflow/blob/c22d88d6ff33031aa113e48aa3fc9aa74ed79595/tensorflow/core/grappler/optimizers/arithmetic_optimizer.cc#L390-L401) has undefined behavior due to dereferencing a null pointer in corner cases that result in optimizing a node with no inputs. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
tensorflow tensorflow Affected: < 2.1.4
Affected: >= 2.2.0, < 2.2.3
Affected: >= 2.3.0, < 2.3.3
Affected: >= 2.4.0, < 2.4.2
Create a notification for this product.
Show details on NVD website

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CVE-2021-30500 (GCVE-0-2021-30500)

Vulnerability from cvelistv5 – Published: 2021-05-26 23:51 – Updated: 2024-08-03 22:32
VLAI
Summary
Null pointer dereference was found in upx PackLinuxElf::canUnpack() in p_lx_elf.cpp,in version UPX 4.0.0. That allow attackers to execute arbitrary code and cause a denial of service via a crafted file.
Severity
No CVSS data available.
CWE
Assigner
Impacted products
Vendor Product Version
n/a upx Affected: upx 4.0
Show details on NVD website

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CVE-2021-31618 (GCVE-0-2021-31618)

Vulnerability from cvelistv5 – Published: 2021-06-15 00:00 – Updated: 2024-08-03 23:03
VLAI
Title
NULL pointer dereference on specially crafted HTTP/2 request
Summary
Apache HTTP Server protocol handler for the HTTP/2 protocol checks received request headers against the size limitations as configured for the server and used for the HTTP/1 protocol as well. On violation of these restrictions and HTTP response is sent to the client with a status code indicating why the request was rejected. This rejection response was not fully initialised in the HTTP/2 protocol handler if the offending header was the very first one received or appeared in a a footer. This led to a NULL pointer dereference on initialised memory, crashing reliably the child process. Since such a triggering HTTP/2 request is easy to craft and submit, this can be exploited to DoS the server. This issue affected mod_http2 1.15.17 and Apache HTTP Server version 2.4.47 only. Apache HTTP Server 2.4.47 was never released.
Severity
No CVSS data available.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Impacted products
Credits
Apache HTTP server would like to thank LI ZHI XIN from NSFocus for reporting this.
Show details on NVD website

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CVE-2021-32843 (GCVE-0-2021-32843)

Vulnerability from cvelistv5 – Published: 2023-02-17 00:00 – Updated: 2025-03-10 21:10
VLAI
Summary
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, `virtio.c` has is a call to `vc_cfgread` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit df0e46c7dbfd81a957d85e449ba41b52f6f7beb4.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Impacted products
Vendor Product Version
moby hyperkit Affected: 0.20210107 , ≤ 0.20210107 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2021-32844 (GCVE-0-2021-32844)

Vulnerability from cvelistv5 – Published: 2023-02-17 00:00 – Updated: 2025-03-10 21:10
VLAI
Summary
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, ` vi_pci_write` has is a call to `vc_cfgwrite` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13.
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Impacted products
Vendor Product Version
moby hyperkit Affected: 0.20210107 , ≤ 0.20210107 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2021-32963 (GCVE-0-2021-32963)

Vulnerability from cvelistv5 – Published: 2021-09-23 13:32 – Updated: 2024-09-17 01:20
VLAI
Title
AVEVA SuiteLink Server Null Pointer Dereference
Summary
Null pointer dereference in SuiteLink server while processing commands 0x03/0x10
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Date Public
2021-08-19 00:00
Credits
Sharon Brizinov of Claroty reported these vulnerabilities to AVEVA
Show details on NVD website

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CVE-2021-32971 (GCVE-0-2021-32971)

Vulnerability from cvelistv5 – Published: 2021-09-23 13:32 – Updated: 2024-09-17 01:06
VLAI
Title
AVEVA SuiteLink Server Null Pointer Dereference
Summary
Null pointer dereference in SuiteLink server while processing command 0x07
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Date Public
2021-08-19 00:00
Credits
Sharon Brizinov of Claroty reported these vulnerabilities to AVEVA
Show details on NVD website

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CVE-2021-32979 (GCVE-0-2021-32979)

Vulnerability from cvelistv5 – Published: 2021-09-23 13:32 – Updated: 2024-09-16 20:51
VLAI
Title
AVEVA SuiteLink Server Null Pointer Dereference
Summary
Null pointer dereference in SuiteLink server while processing commands 0x04/0x0a
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Date Public
2021-08-19 00:00
Credits
Sharon Brizinov of Claroty reported these vulnerabilities to AVEVA
Show details on NVD website

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Mitigation ID: MIT-56

Phase: Implementation

Description:

  • 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].
Mitigation

Phase: Requirements

Description:

  • Select a programming language that is not susceptible to these issues.
Mitigation

Phase: Implementation

Description:

  • Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation

Phase: Architecture and Design

Description:

  • 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.
Mitigation

Phase: Implementation

Description:

  • Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.

No CAPEC attack patterns related to this CWE.

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