#VU91383 Division by zero in Linux kernel - CVE-2015-4003

Vulnerability identifier: #VU91383

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-4003

CWE-ID: CWE-369

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a division by zero error within the oz_usb_handle_ep_data() function in drivers/staging/ozwpan/ozusbsvc1.c. A remote non-authenticated attacker can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://openwall.com/lists/oss-security/2015/06/05/7
https://github.com/torvalds/linux/commit/04bf464a5dfd9ade0dda918e44366c2c61fce80b
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=04bf464a5dfd9ade0dda918e44366c2c61fce80b
https://www.securityfocus.com/bid/74668
https://lists.opensuse.org/opensuse-security-announce/2015-08/msg00011.html
https://www.ubuntu.com/usn/USN-2667-1
https://www.ubuntu.com/usn/USN-2665-1

---

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.