Cryptographic issues in Ruby - CVE-2012-5371
Published: November 28, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43289
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2012-5371
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Ruby
Ruby
Software vendor:
Ruby
Ruby
Description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
Ruby (aka CRuby) 1.9 before 1.9.3-p327 and 2.0 before r37575 computes hash values without properly 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, as demonstrated by a universal multicollision attack against a variant of the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4815.
Remediation
Install update from vendor's website.
External links
- http://2012.appsec-forum.ch/conferences/#c17
- http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf
- http://secunia.com/advisories/51253
- http://securitytracker.com/id?1027747
- http://www.ocert.org/advisories/ocert-2012-001.html
- http://www.osvdb.org/87280
- http://www.ruby-lang.org/en/news/2012/11/09/ruby19-hashdos-cve-2012-5371/
- http://www.securityfocus.com/bid/56484
- http://www.ubuntu.com/usn/USN-1733-1
- https://bugzilla.redhat.com/show_bug.cgi?id=875236
- https://exchange.xforce.ibmcloud.com/vulnerabilities/79993
- https://www.131002.net/data/talks/appsec12_slides.pdf