Vulnerability identifier: #VU21453
Vulnerability risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]
CVE-ID:
CWE-ID:
CWE-125
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
DjVuLibre
Client/Desktop applications /
Multimedia software
Vendor: DjVu
Description
The vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to a boundary condition in the JB2Dict::JB2Codec::get_direct_context in libdjvu/JB2Image.h within DjVuLibre due to a missing zero-bytes check in libdjvu/GBitmap.h. A remote attacker can create a specially crafted JB2 file, trick the victim into opening it, trigger out-of-bounds read error and crash the application.
Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versions
DjVuLibre: 3.5.27
External links
http://sourceforge.net/p/djvu/bugs/298/
http://sourceforge.net/p/djvu/djvulibre-git/ci/9658b01431cd7ff6344d7787f855179e73fe81a7/
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.