SB2026080550 - Multiple vulnerabilities in tesseract

Description

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read (CVE-ID: N/A)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds read in the DAWG dictionary loader when parsing a crafted .traineddata model file during initialization. A remote attacker can supply a specially crafted .traineddata model file to cause a denial of service.

The issue is triggered at model-load time before any image is processed.

2) Out-of-bounds write (CVE-ID: N/A)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to out-of-bounds write in the LSTM Convolve layer when parsing a crafted .traineddata LSTM model component during ordinary OCR recognition. A remote attacker can supply a specially crafted .traineddata file to cause a denial of service.

The issue is triggered after the malicious model file is loaded through Tesseract's .traineddata deserializer.

Remediation

Install update from vendor's website.

References

• https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-x3vq-7rr7-5x3h
• https://github.com/tesseract-ocr/tesseract/pull/4581
• https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7j76-5rq5-5jg8