CVE-2020-8165
unknown
CVSS v3
—
CVSS v4 NEW
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VIR risk
—
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.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 2:5.2.4.3+dfsg-1 |
| sid | Fixed | 2:5.2.4.3+dfsg-1 |
| forky | Fixed | 2:5.2.4.3+dfsg-1 |
| bullseye | Fixed | 2:5.2.4.3+dfsg-1 |
| bookworm | Fixed | 2:5.2.4.3+dfsg-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| RubyGems | activesupport | <~> 5.2.4, >= 5.2.4.3 | ~> 5.2.4, >= 5.2.4.3 |
| RubyGems | activesupport | >=5.0.0,<5.2.4.3 | 5.2.4.3 |
| RubyGems | activesupport | >=6.0.0,<6.0.3.1 | 6.0.3.1 |
References
- https://groups.google.com/forum/#!topic/rubyonrails-security/bv6fW4S0Y1c
- https://www.suse.com/security/cve/CVE-2020-8165.html
- https://nvd.nist.gov/vuln/detail/CVE-2020-8165
- https://hackerone.com/reports/413388
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2020-8165.yml
- https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c
- https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html
- https://security.netapp.com/advisory/ntap-20250509-0002
- https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released
- https://www.debian.org/security/2020/dsa-4766
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html
- https://security-tracker.debian.org/tracker/CVE-2020-8165
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.