CVE-2020-8165
CRITICAL9.8EPSS 90.1%ActiveSupport potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore
Published: 5/26/2020Modified: 4/28/2026
Description
A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE.
Affected packages (2)
- Debian/railsfrom 0, < 2:5.2.4.3+dfsg-1
- RubyGems/activesupport>= 5.0.0, < 5.2.4.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References (13)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-8165
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-8165
- WEBhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html
- WEBhttp://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html
- WEBhttps://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2020-8165.yml
- WEBhttps://groups.google.com/forum/#!topic/rubyonrails-security/bv6fW4S0Y1c
- WEBhttps://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c
- WEBhttps://hackerone.com/reports/413388
- WEBhttps://lists.debian.org/debian-lts-announce/2020/06/msg00022.html
- WEBhttps://lists.debian.org/debian-lts-announce/2020/07/msg00013.html
- WEBhttps://security.netapp.com/advisory/ntap-20250509-0002
- WEBhttps://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released
- WEBhttps://www.debian.org/security/2020/dsa-4766