Heap-buffer-overflow in Ins_PUSHW in ghostscript
Summary
OSV-2022-926: Heap-buffer-overflow in Ins_PUSHW. Affects ghostscript versions >= 8dbed5ca0bb6fa6fdd5842356f2adf62bdf1c5b4, < a34f2ae161150be22b966b1fd584f4979f5d97aa. Fixed in a34f2ae161150be22b966b1fd584f4979f5d97aa. How to fix ↓
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Background
Ghostscript is an open-source interpreter for the PostScript language and the PDF file format. It is widely used for rendering and converting documents. The vulnerability in question, identified as OSV-2022-926, is a heap-buffer-overflow issue that affects the Ins_PUSHW function within Ghostscript. This vulnerability can potentially lead to a crash or allow an attacker to execute arbitrary code.
Vulnerability Detail
The Ins_PUSHW function in Ghostscript is susceptible to a heap-buffer-overflow vulnerability. This vulnerability occurs when the function attempts to read more data from a buffer than it can hold, resulting in memory corruption. An attacker could exploit this vulnerability by crafting a malicious PostScript or PDF file, which, when processed by Ghostscript, triggers the heap-buffer-overflow. The consequences of this vulnerability include crashes, denial-of-service, and potential remote code execution.
How To Fix
Minimum fixed version
a34f2ae161150be22b966b1fd584f4979f5d97aa
This is the first release that contains the fix.
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Workaround
As a workaround, users can consider implementing input validation and sanitization measures to mitigate the risk of processing malicious PostScript or PDF files. Additionally, it is advisable to exercise caution when opening files from untrusted sources.
Conclusion
In conclusion, the Ins_PUSHW function in Ghostscript is vulnerable to a heap-buffer-overflow issue. It is crucial to update Ghostscript to a version that includes the fix to mitigate the risk of crashes, denial-of-service, and potential remote code execution. Implementing input validation and exercising caution when handling files from untrusted sources can provide additional protection. For further assistance with vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for ghostscript →
FAQ
Ghostscript is an open-source interpreter for the PostScript language and the PDF file format. It is commonly used for rendering and converting documents.
This vulnerability can lead to crashes, denial-of-service, and potential remote code execution if exploited by an attacker.
To fix this vulnerability, update Ghostscript to a version that includes the fix. The commit a34f2ae161150be22b966b1fd584f4979f5d97aa in the Git repository addresses this issue.
Implementing input validation and sanitization measures can help mitigate the risk of processing malicious files. Additionally, exercise caution when opening files from untrusted sources.
For more information about this vulnerability, refer to the OSS-Fuzz report at https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=51618.
References
Related vulnerabilities
Recent vulnerabilities recorded for ghostscript.
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