Global-buffer-overflow in libdwarf: _dwarf_pathjoinl
Summary
OSV-2022-389: Global-buffer-overflow in _dwarf_pathjoinl. Affects libdwarf versions >= 6af6e566ae71b585659484e7be7cbab83dd770fb, < 24dff940cc4c71a9c3cb5475aee231b19163a12c. Fixed in 24dff940cc4c71a9c3cb5475aee231b19163a12c. How to fix ↓
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Background
libdwarf is an open-source library that provides access to DWARF debugging information in executable files. It is commonly used by developers and debuggers to extract and analyze debugging information. This vulnerability affects the libdwarf library and can lead to a global-buffer-overflow when processing certain inputs.
Vulnerability Detail
The vulnerability originates from a global-buffer-overflow in the _dwarf_pathjoinl function of libdwarf. This can be triggered when constructing a linked path in the dwarf_gnu_debuglink function. An attacker could exploit this vulnerability by providing a specially crafted input, leading to a buffer overflow and potential code execution. The impact of this vulnerability can range from crashing the application to remote code execution, depending on how the library is used.
How To Fix
Minimum fixed version
24dff940cc4c71a9c3cb5475aee231b19163a12c
This is the first release that contains the fix.
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Workaround
As a temporary workaround, developers can implement input validation and bounds checking when using the affected functions in libdwarf. By ensuring that inputs are properly validated and do not exceed the expected bounds, the risk of triggering the buffer overflow can be mitigated.
Conclusion
In conclusion, the libdwarf library is affected by a global-buffer-overflow vulnerability in the _dwarf_pathjoinl function. This vulnerability can be exploited to execute arbitrary code or crash the application. It is recommended to update to a fixed version of libdwarf and implement input validation as a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
libdwarf is an open-source library that provides access to DWARF debugging information in executable files. It is commonly used by developers and debuggers to extract and analyze debugging information.
A global-buffer-overflow is a type of buffer overflow vulnerability where data is written beyond the bounds of a buffer, potentially overwriting adjacent memory. This can lead to crashes, code execution, or other unintended behavior.
This vulnerability can be exploited by providing a specially crafted input to the affected functions in libdwarf. By triggering a buffer overflow, an attacker could potentially execute arbitrary code or crash the application.
Yes, this vulnerability has been fixed in the libdwarf library. Developers should update their dependencies to include the fixed version of libdwarf.
As a temporary workaround, developers can implement input validation and bounds checking when using the affected functions in libdwarf. By ensuring that inputs are properly validated and do not exceed the expected bounds, the risk of triggering the buffer overflow can be mitigated.
References
Related vulnerabilities
Recent vulnerabilities recorded for libdwarf.
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