CWE-196

Unsigned to Signed Conversion Error

The product uses an unsigned primitive and performs a cast to a signed primitive, which can produce an unexpected value if the value of the unsigned primitive can not be represented using a signed primitive.

CVE-2020-13545 (GCVE-0-2020-13545)
Vulnerability from cvelistv5
Published
2021-01-06 14:50
Modified
2024-08-04 12:18
Severity ?
8.8 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
  • CWE-196 - Unsigned to Signed Conversion Error
Summary
An exploitable signed conversion vulnerability exists in the TextMaker document parsing functionality of SoftMaker Office 2021’s TextMaker application. A specially crafted document can cause the document parser to miscalculate a length used to allocate a buffer, later upon usage of this buffer the application will write outside its bounds resulting in a heap-based memory corruption. An attacker can entice the victim to open a document to trigger this vulnerability.
References
Impacted products
Vendor Product Version
n/a Softmaker Version: SoftMaker Software GmbH SoftMaker Office TextMaker 2021 (revision 1014)
Show details on NVD website

To clipboard 

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CVE-2020-7067 (GCVE-0-2020-7067)
Vulnerability from cvelistv5
Published
2020-04-27 20:38
Modified
2024-09-17 02:21
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-125 - Out-of-bounds Read
  • CWE-196 - Unsigned to Signed Conversion Error
Summary
In PHP versions 7.2.x below 7.2.30, 7.3.x below 7.3.17 and 7.4.x below 7.4.5, if PHP is compiled with EBCDIC support (uncommon), urldecode() function can be made to access locations past the allocated memory, due to erroneously using signed numbers as array indexes.
References
Impacted products
Vendor Product Version
PHP Group PHP Version: 7.2.x below 7.2.30
Version: 7.3.x below 7.3.17 and 7.4.x below 7.4.5
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2022-36025 (GCVE-0-2022-36025)
Vulnerability from cvelistv5
Published
2022-09-24 02:00
Modified
2025-04-23 16:55
Severity ?
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-681 - Incorrect Conversion between Numeric Types
  • CWE-196 - Unsigned to Signed Conversion Error
Summary
Besu is a Java-based Ethereum client. In versions newer than 22.1.3 and prior to 22.7.1, Besu is subject to an Incorrect Conversion between Numeric Types. An error in 32 bit signed and unsigned types in the calculation of available gas in the CALL operations (including DELEGATECALL) results in incorrect gas being passed into called contracts and incorrect gas being returned after call execution. Where the amount of gas makes a difference in the success or failure, or if the gas is a negative 64 bit value, the execution will result in a different state root than expected, resulting in a consensus failure in networks with multiple EVM implementations. In networks with a single EVM implementation this can be used to execute with significantly more gas than then transaction requested, possibly exceeding gas limitations. This issue is patched in version 22.7.1. As a workaround, reverting to version 22.1.3 or earlier will prevent incorrect execution.
References
Impacted products
Vendor Product Version
hyperledger besu Version: > 22.1.3, < 22.7.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2023-0185 (GCVE-0-2023-0185)
Vulnerability from cvelistv5
Published
2023-04-01 04:38
Modified
2025-02-13 16:38
Severity ?
6.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:H
CWE
  • CWE-196 - Unsigned to Signed Conversion Error
Summary
NVIDIA GPU Display Driver for Linux contains a vulnerability in the kernel mode layer, where sign conversion issuescasting an unsigned primitive to signed may lead to denial of service or information disclosure.
References
Impacted products
Vendor Product Version
NVIDIA vGPU software (Virtual GPU Manager - Citrix Hypervisor, VMware vSphere, Red Hat Enterprise Linux KVM), NVIDIA Cloud Gaming (Virtual GPU Manager - Red Hat Enterprise Linux KVM) Version: All versions prior to and including 15.1, 13.6, 11.11, and all versions prior to and including February 2023 release
 Create a notification for this product.
Show details on NVD website

To clipboard 

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Mitigation

Phase: Requirements

Description:

  • Choose a language which is not subject to these casting flaws.
Mitigation

Phase: Architecture and Design

Description:

  • Design object accessor functions to implicitly check values for valid sizes. Ensure that all functions which will be used as a size are checked previous to use as a size. If the language permits, throw exceptions rather than using in-band errors.
Mitigation

Phase: Implementation

Description:

  • Error check the return values of all functions. Be aware of implicit casts made, and use unsigned variables for sizes if at all possible.
CAPEC-92: Forced Integer Overflow

This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

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