Home/CVE/A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an attack
CVE

CVE-2020-8165

A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an attack

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.

CRITICAL · CVSS 9.8 EPSS 0.90128
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-502Deserialization of Untrusted Data
CWE-502Deserialization of Untrusted Data
▤

Affected Products & Versions

4
rubyonrails rails< 5.2.4.3
rubyonrails rails>= 6.0.0 and < 6.0.3.1
debian linuxall versions
opensuse leapall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
RubyGems activesupport CRITICAL fixed in 5.2.4.3
⚠

Public Exploits & PoCs

1
pochackerone.com · 413388hackerone.com
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumRuby on Rails Framework Exceptions
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · support@hackerone.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Jun 2020 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

14
suse-csafopenSUSE-SU-2024:10589-1
suse-csafopenSUSE-SU-2024:11330-1
suse-csafopenSUSE-SU-2024:11331-1
suse-csafopenSUSE-SU-2024:11828-1
suse-csafopenSUSE-SU-2020:2000-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.htmlMailing ListThird Party Advisory
https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1cMailing ListPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00022.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00013.htmlMailing ListThird Party Advisory
https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/Vendor Advisory
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