CVE Vulnerabilities

CVE-2021-36081

Use After Free

Published: Jul 01, 2021 | Modified: Nov 21, 2024
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

Tesseract OCR 5.0.0-alpha-20201231 has a one_ell_conflict use-after-free during a strpbrk call.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Name Vendor Start Version End Version
Tesseract_ocr Tesseract_ocr_project 5.0.0-alpha-20201231 (including) 5.0.0-alpha-20201231 (including)
Tesseract Ubuntu bionic *
Tesseract Ubuntu focal *
Tesseract Ubuntu groovy *
Tesseract Ubuntu hirsute *
Tesseract Ubuntu impish *
Tesseract Ubuntu kinetic *
Tesseract Ubuntu lunar *
Tesseract Ubuntu mantic *
Tesseract Ubuntu oracular *
Tesseract Ubuntu trusty *
Tesseract Ubuntu trusty/esm *
Tesseract Ubuntu xenial *

Potential Mitigations

References