漏洞信息
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Vulnerability Title
Tesseract: Heap out-of-bounds write in UNICHARSET::load_via_fgets via count/insert desynchronization
Vulnerability Description
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, UNICHARSET::load_via_fgets in src/ccutil/unicharset.cpp trusts the declared unichar count as a loop bound and uses id as an unchecked index into the unichars vector. unichar_insert_backwards_compatible can leave the vector unchanged for an empty, duplicate, or already-encodable representation, causing id to become larger than unichars.size(). Subsequent set_* calls and the write to unichars[id].properties.enabled then write UNICHAR_PROPERTIES beyond the vector during initialization in both the default LSTM and legacy engines, causing heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Vulnerability Type
对数组索引的验证不恰当
Vulnerability Title
tesseract-ocr Tesseract 输入验证错误漏洞
Vulnerability Description
tesseract-ocr Tesseract是tesseract-ocr组织的一款可将图像文字转换为可编辑文本的光学字符识别组件。 tesseract-ocr Tesseract 5.5.3及之前版本存在安全漏洞,该漏洞源于src/ccutil/unicharset.cpp文件中的UNICHARSET::load_via_fgets函数将声明的unichar计数作为循环边界,并将id作为未检查索引访问unichars向量,当遇到空、重复或已可编码的表示时,id可能超出向量大小,导致在初始化过程中越界写入
CVSS Information
N/A
Vulnerability Type
N/A