#VU27333 Integer overflow in musl libc - CVE-2016-8859

Vulnerability identifier: #VU27333

Vulnerability risk: Medium

CVSSv4.0: 4.4 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-8859

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
musl libc
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer overflow when processing a large number of states or tags. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

musl libc: 1.1.0 - 1.1.15

---

External links
https://www.openwall.com/lists/oss-security/2016/10/19/1
https://www.openwall.com/lists/oss-security/2016/10/19/10
https://www.securityfocus.com/bid/93795
https://security.gentoo.org/glsa/201701-11

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.