Vulnerability identifier: #VU86559
Vulnerability risk: Medium
CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]
CVE-ID:
CWE-ID:
CWE-122
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
libxls
Client/Desktop applications /
Multimedia software
Vendor: libxls.sourceforge.net
Description
The vulnerability allows a remote attacker to preform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error within the unicode_decode_wcstombs() function in xlstool.c when parsing style records. A remote attacker can pass a specially crafted file to the application, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack.
Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versions
libxls: 1.0.0 - 1.6.2 rc0
External links
http://github.com/libxls/libxls/issues/124
http://github.com/libxls/libxls/pull/129
http://github.com/libxls/libxls/issues/126
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.