#VU19266 Out-of-bounds read in libmspack - CVE-2019-1010305

Vulnerability identifier: #VU19266

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-1010305

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libmspack
Universal components / Libraries / Libraries used by multiple products

Vendor: Stuart Caie

Description

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when processing a specially crafted chm file in libmspack 0.9.1alpha. A remote attacker can create a specially crafted chm file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libmspack: 0.9.1alpha

---

External links
https://github.com/kyz/libmspack/commit/2f084136cfe0d05e5bf5703f3e83c6d955234b4d
https://github.com/kyz/libmspack/issues/27
https://usn.ubuntu.com/4066-1/

---

Q & A

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.