Input validation error in ruby (Alpine package)

1) Input validation error

EUVDB-ID: #VU32730

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-2011-4815

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

Ruby (aka CRuby) before 1.8.7-p357 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ruby (Alpine package): 1.8.7-r0 - 1.8.7_p352-r1

CPE2.3

• cpe:2.3:o:alpine:ruby_alpine_package:1.8.7-r0:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:ruby_alpine_package:1.8.7_p299-r1:*:*:*:*:alpine_linux:*:2.1
• cpe:2.3:o:alpine:ruby_alpine_package:1.8.7_p352-r0:*:*:*:*:alpine_linux:*:2.3

External links

https://git.alpinelinux.org/aports/commit/?id=d6d085224165edfe2dd5bf56b2ef43c2865896df
https://git.alpinelinux.org/aports/commit/?id=99662c2c900022a7c8f602278d10dac9282b8dc7
https://git.alpinelinux.org/aports/commit/?id=9e3c4c8431fcb4ee6175eefef0db3aefad7b7e4f

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.