CVE-2020-8162: debian debian_linux
Vulnerability summary
CVE-2020-8162 is a high (CVSS 7.5) vulnerability in debian debian_linux. EPSS estimates a 3.03% chance of exploitation in the next 30 days, higher than 87.4% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 1Timeline
- 19-06-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · RubygemsEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
3.03%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.03% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (hackerone.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-602Client-Side Enforcement of Server-Side SecurityThe product includes a server that relies on the client to implement a protection mechanism that is intended to protect the server.
- CWE-434Unrestricted Upload of File with Dangerous TypeThe product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- rails< 2:5.2.4.3+dfsg-1
- debian_linuxEOL10.0
RubyGems1 product
- activestorage≥ 5.0.0, < 5.2.4.3 | ≥ 6.0.0, < 6.0.3.1
Rubyonrails1 product
- rails< 5.2.4.2 | ≥ 6.0.0, < 6.0.3.1
Ubuntu1 product
- railsAll versions (No fix recorded)
4 vendors · 5 products
References
13 links- groups.google.com/g/rubyonrails-security/c/PjU3946mreQX Refsource MISCWEBMailing ListPatchThird Party Advisory
