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

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU33320

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2012-4464

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

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

Ruby 1.9.3 before patchlevel 286 and 2.0 before revision r37068 allows context-dependent attackers to bypass safe-level restrictions and modify untainted strings via the (1) exc_to_s or (2) name_err_to_s API function, which marks the string as tainted, a different vulnerability than CVE-2012-4466. NOTE: this issue might exist because of a CVE-2011-1005 regression.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ruby (Alpine package): 1.8.7_p358-r1 - 1.9.3_p484-r0

CPE2.3

• cpe:2.3:o:alpine:ruby_alpine_package:1.8.7_p358-r1:*:*:*:*:alpine_linux:*:2.4
• cpe:2.3:o:alpine:ruby_alpine_package:1.8.7_p374-r0:*:*:*:*:alpine_linux:*:2.4
• cpe:2.3:o:alpine:ruby_alpine_package:1.8.7_p374-r1:*:*:*:*:alpine_linux:*:2.4

External links

https://git.alpinelinux.org/aports/commit/?id=45607bc1477202e1308cc8dcb038fe9fc67885b7

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.