Common Weakness Enumeration

CWE-125

Allowed

Out-of-bounds Read

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product reads data past the end, or before the beginning, of the intended buffer.

11620 vulnerabilities reference this CWE, most recent first.

CVE-2021-20266 (GCVE-0-2021-20266)

Vulnerability from cvelistv5 – Published: 2021-04-30 11:22 – Updated: 2024-08-03 17:37
VLAI
Summary
A flaw was found in RPM's hdrblobInit() in lib/header.c. This flaw allows an attacker who can modify the rpmdb to cause an out-of-bounds read. The highest threat from this vulnerability is to system availability.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a rpm Affected: rpm 4.17.0
Show details on NVD website
To clipboard 

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CVE-2021-20254 (GCVE-0-2021-20254)

Vulnerability from cvelistv5 – Published: 2021-05-05 13:36 – Updated: 2024-08-03 17:37
VLAI
Summary
A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a samba Affected: samba 4.14.1, samba 4.13.6, samba 4.12.13
Show details on NVD website
To clipboard 

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CVE-2021-20221 (GCVE-0-2021-20221)

Vulnerability from cvelistv5 – Published: 2021-05-13 15:34 – Updated: 2024-08-03 17:30
VLAI
Summary
An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a qemu Affected: up to, including qemu 4.2.0
Show details on NVD website
To clipboard 

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CVE-2021-20177 (GCVE-0-2021-20177)

Vulnerability from cvelistv5 – Published: 2021-05-26 20:48 – Updated: 2024-08-03 17:30
VLAI
Summary
A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: kernel 5.5-rc1
Show details on NVD website
To clipboard 

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CVE-2021-20024 (GCVE-0-2021-20024)

Vulnerability from cvelistv5 – Published: 2021-07-09 21:25 – Updated: 2024-08-03 17:30
VLAI
Summary
Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows an attacker to cause a system instability or potentially read sensitive information from the memory locations.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
SonicWall SonicWall Switch Affected: 1.0.0.5-16 and earlier
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-4193 (GCVE-0-2021-4193)

Vulnerability from cvelistv5 – Published: 2021-12-31 00:00 – Updated: 2024-08-03 17:16
VLAI
Title
Out-of-bounds Read in vim/vim
Summary
vim is vulnerable to Out-of-bounds Read
Severity
5.5 (Medium)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
vim vim/vim Affected: unspecified , < 8.2.3901 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-4166 (GCVE-0-2021-4166)

Vulnerability from cvelistv5 – Published: 2021-12-25 18:15 – Updated: 2024-08-03 17:16
VLAI
Title
Out-of-bounds Read in vim/vim
Summary
vim is vulnerable to Out-of-bounds Read
Severity
7.1 (High)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
vim vim/vim Affected: unspecified , < 8.2 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2021-4156 (GCVE-0-2021-4156)

Vulnerability from cvelistv5 – Published: 2022-03-23 00:00 – Updated: 2025-12-11 12:06
VLAI
Summary
An out-of-bounds read flaw was found in libsndfile's FLAC codec functionality. An attacker who is able to submit a specially crafted file (via tricking a user to open or otherwise) to an application linked with libsndfile and using the FLAC codec, could trigger an out-of-bounds read that would most likely cause a crash but could potentially leak memory information that could be used in further exploitation of other flaws.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a libsndfile Affected: libsndfile 1.1.0
Show details on NVD website
To clipboard 

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CVE-2021-4093 (GCVE-0-2021-4093)

Vulnerability from cvelistv5 – Published: 2022-02-18 17:50 – Updated: 2024-08-03 17:16
VLAI
Summary
A flaw was found in the KVM's AMD code for supporting the Secure Encrypted Virtualization-Encrypted State (SEV-ES). A KVM guest using SEV-ES can trigger out-of-bounds reads and writes in the host kernel via a malicious VMGEXIT for a string I/O instruction (for example, outs or ins) using the exit reason SVM_EXIT_IOIO. This issue results in a crash of the entire system or a potential guest-to-host escape scenario.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a kernel Affected: kernel 5.15
Show details on NVD website
To clipboard 

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CVE-2021-4048 (GCVE-0-2021-4048)

Vulnerability from cvelistv5 – Published: 2021-12-08 21:24 – Updated: 2024-08-03 17:16
VLAI
Summary
An out-of-bounds read flaw was found in the CLARRV, DLARRV, SLARRV, and ZLARRV functions in lapack through version 3.10.0, as also used in OpenBLAS before version 0.3.18. Specially crafted inputs passed to these functions could cause an application using lapack to crash or possibly disclose portions of its memory.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a lapack Affected: lapack through version 3.10.0
Show details on NVD website
To clipboard 

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Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • To reduce the likelihood of introducing an out-of-bounds read, ensure that you validate and ensure correct calculations for any length argument, buffer size calculation, or offset. Be especially careful of relying on a sentinel (i.e. special character such as NUL) in untrusted inputs.
Mitigation
Architecture and Design

Strategy: Language Selection

Use a language that provides appropriate memory abstractions.

CAPEC-540: Overread Buffers

An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

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