CVE-2017-12443 : Security Advisory and Response
Learn about CVE-2017-12443, a vulnerability in minidjvu 0.8 that can lead to a denial of service due to an invalid memory read when processing a crafted djvu file. Find mitigation steps and prevention measures here.
CVE-2017-12443 was published on August 17, 2017, and affects minidjvu 0.8. The vulnerability can lead to a denial of service due to an invalid memory read when processing a crafted djvu file.
Understanding CVE-2017-12443
This CVE entry describes a vulnerability in minidjvu 0.8 that can be exploited by a specially crafted djvu file to cause a denial of service.
What is CVE-2017-12443?
The vulnerability in minidjvu 0.8 allows an attacker to trigger an invalid memory read and application crash by manipulating the mdjvu_bitmap_pack_row function with a malicious djvu file.
The Impact of CVE-2017-12443
The vulnerability can result in a denial of service, causing the application to crash when processing a crafted djvu file.
Technical Details of CVE-2017-12443
This section provides more technical insights into the vulnerability.
Vulnerability Description
The mdjvu_bitmap_pack_row function in base/4bitmap.c in minidjvu 0.8 is susceptible to a denial of service attack through an invalid memory read triggered by a specially crafted djvu file.
Affected Systems and Versions
- Product: minidjvu 0.8
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
The vulnerability is exploited by crafting a malicious djvu file that triggers the mdjvu_bitmap_pack_row function, leading to an invalid memory read and application crash.
Mitigation and Prevention
Protecting systems from CVE-2017-12443 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Avoid opening or processing untrusted djvu files.
- Implement file type and content validation mechanisms.
- Consider using alternative software until a patch is available.
Long-Term Security Practices
- Keep software and systems up to date with the latest security patches.
- Conduct regular security audits and vulnerability assessments.
- Educate users on safe browsing and file handling practices.
Patching and Updates
- Monitor official sources for patches and updates from the minidjvu project.
- Apply patches promptly to mitigate the vulnerability and enhance system security.