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Vulnerability DatabaseCVE-2021-33480

CVE-2021-33480: 
Linux Debian vulnerability analysis and mitigation

Overview

An use-after-free vulnerability was discovered in GOCR (GNU Optical Character Recognition) through version 0.53-20200802. The vulnerability specifically affects the context_correction() function in the pgm2asc.c file (CVE Details).

Technical details

The vulnerability is classified as a use-after-free issue (CWE-416) that occurs in the context_correction() function. The bug manifests in two specific locations within pgm2asc.c: at line 2857:51 and line 2817:39. When triggered, the vulnerability causes the program to attempt to read 4 bytes from previously freed memory regions (SourceForge Bug 40, SourceForge Bug 41).

Impact

The vulnerability affects the core functionality of GOCR, which is used for converting scanned images of text back to text files. While the immediate impact appears to be a crash in the CLI tool, the use-after-free condition could potentially lead to more severe consequences in certain contexts (Gentoo Advisory).

Mitigation and workarounds

As of January 2024, some distributions like Gentoo have discontinued support for GOCR and recommend users uninstall the package using 'emerge --ask --depclean "app-text/gocr"'. No specific patches have been identified for this vulnerability (Gentoo Advisory).

Additional resources

Source: This report was generated using AI

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