CVE-2020-8165
CRITICAL
9.8
CVSS Score
Published: June 19, 2020 at 05:05 PM UTC
Updated: June 17, 2026 at 03:25 AM UTC
3 products affected across 3 vendorsDebian LinuxLeapRails
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Severity
CRITICAL9.8
Exploit prediction
EPSS 46%
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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Debian Linux· Debiandrupal
95%Leap· openSUSEdrupal
95%v < 5.2.4.36.0.0 ≤ v < 6.0.3.1
Vendor states this is fixed in 5.2.4.3 (unaffected)
Affected range stops below 6.0.3.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html
- https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c
- https://hackerone.com/reports/413388
- https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/
References (9)
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.htmlVendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.htmlx_refsource_MISCMailing ListPatchThird Party Advisory
Source: [email protected]
https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1cx_refsource_MISCExploitPatchThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/413388Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/06/msg00022.htmlMailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2020/07/msg00013.htmlx_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/Vendor Advisoryx_refsource_DEBIANThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2020/dsa-4766CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-502
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