Remote code execution in linux-firmware (Alpine package)

1) Remote code execution

EUVDB-ID: #VU2215

Risk: High

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2015-5621

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to the snmp_pdu_parse function in snmp_api.c does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails. A remote attacker can supply specially crafted input and cause denial of service or execute arbitrary code with elevated privileges.

Mitigation

Install update from vendor's website.

Vulnerable software versions

linux-firmware (Alpine package): before 20180615-r2

CPE2.3

• cpe:2.3:o:alpine:linux-firmware_alpine_package:*:*:*:*:*:alpine_linux:*:3.8

External links

https://git.alpinelinux.org/aports/commit/?id=35e2993f2f4973ae7f7e8aca72dc087c34076f20
https://git.alpinelinux.org/aports/commit/?id=d2bfb22c8e8f67ad7d8d02704f35ec4d2a19f9b9
https://git.alpinelinux.org/aports/commit/?id=5dee66641ebb81f56486be12c4cbb4edf40642a3
https://git.alpinelinux.org/aports/commit/?id=806be1157926f79d39530bf13f9d388dde037426
https://git.alpinelinux.org/aports/commit/?id=09f1cb8fc8c006e59a36dd2930f62113cd7f38d4
https://git.alpinelinux.org/aports/commit/?id=1cc17473b842734155ab967aa1d64e7941c44d28
https://git.alpinelinux.org/aports/commit/?id=7cdb08f4a0e7984d2b56cac22996f3fed4e089b2
https://git.alpinelinux.org/aports/commit/?id=952004e3925d2c79bbdc8415aeb08d9c2e57a29a

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.