Permissions, Privileges, and Access Controls in sudo (Alpine package)

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32397

Risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2015-5602

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

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to execute arbitrary code.

sudoedit in Sudo before 1.8.15 allows local users to gain privileges via a symlink attack on a file whose full path is defined using multiple wildcards in /etc/sudoers, as demonstrated by "/home/*/*/file.txt."

Mitigation

Install update from vendor's website.

Vulnerable software versions

sudo (Alpine package): 1.8.1p1-r0 - 1.8.13-r0

CPE2.3

• cpe:2.3:o:alpine:sudo_alpine_package:1.8.1p1-r0:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:sudo_alpine_package:1.8.3_p1-r0:*:*:*:*:alpine_linux:*:2.3
• cpe:2.3:o:alpine:sudo_alpine_package:1.8.3_p2-r0:*:*:*:*:alpine_linux:*:2.1

External links

https://git.alpinelinux.org/aports/commit/?id=c7dbb7e2966b00bf670a3ab905dfe251914426a9
https://git.alpinelinux.org/aports/commit/?id=fba7fa3110d1f8d8dc31ef68a5c7d2f0e2cd2886
https://git.alpinelinux.org/aports/commit/?id=838b3e30f36bfa34a3e0d1fc23ee65723f32ef8b
https://git.alpinelinux.org/aports/commit/?id=31a086dacff2bf902e509022f3645d00a5d7fe4d

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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