Fluid Attacks Database

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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
debian 12	rails	>=0 <2:5.2.4.3+dfsg-1	2:5.2.4.3+dfsg-1
debian 14	rails	>=0 <2:5.2.4.3+dfsg-1	2:5.2.4.3+dfsg-1
debian 13	rails	>=0 <2:5.2.4.3+dfsg-1	2:5.2.4.3+dfsg-1
rubygems	activesupport	>=5.0.0 <5.2.4.3 \|\| >=6.0.0 <6.0.3.1	5.2.4.3, 6.0.3.1
rubygems	rails	>=0 <5.2.4.3 \|\| >=6.0.0 <6.0.3.1	5.2.4.3, 6.0.3.1

Aliases

1. CVE-2020-81652. NVD-2020-81653. OSV-DEBIAN-2020-81654. OSV-2020-81655. GCVE-2020-81656. SECURITY-TRACKER-CVE-2020-81657. lists.debian.org8. lists.debian.org

References

1. https://github.com/masahiro331/CVE-2020-81652. https://hackerone.com/reports/4133883. https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2020-8165.yml4. https://groups.google.com/forum/#!topic/rubyonrails-security/bv6fW4S0Y1c5. https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c6. https://security.netapp.com/advisory/ntap-20250509-00027. https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released8. https://www.debian.org/security/2020/dsa-47669. http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html10. http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html

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