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CVE-2021-39880

MEDIUM
Published 2021-10-05T14:01:43
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CVSS Score

V3.1
6.5
/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.004
probability
of exploitation in the wild

There is a 0.4% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.589
Higher than 58.9% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Description

A Denial Of Service vulnerability in the apollo_upload_server Ruby gem in GitLab CE/EE all versions starting from 11.9 before 14.0.9, all versions starting from 14.1 before 14.1.4, and all versions starting from 14.2 before 14.2.2 allows an attacker to deny access to all users via specially crafted requests to the apollo_upload_server middleware.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

GitLab

GitLab

Affected Versions:

>=14.2, <14.2.2 >=14.1, <14.1.4 >=11.9, <14.0.9

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

apollo_upload_server has Denial of Service vulnerability

GHSA-w6pv-c757-6rgr

Advisory Details

A Denial Of Service vulnerability in the apollo_upload_server Ruby gem in GitLab CE/EE version 11.11 and above allows an attacker to deny access to all users via specially crafted requests to the apollo_upload_server middleware.

Affected Packages

RubyGems apollo_upload_server
ECOSYSTEM: ≥0 <2.1.0

CVSS Scoring

CVSS Score

5.0

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-39880
WEB https://github.com/jetruby/apollo_upload_server-ruby/pull/44
WEB https://github.com/jetruby/apollo_upload_server-ruby/commit/b0582c1a3e458eee3c994fb38278bd0221f20486
WEB https://hackerone.com/reports/1181284
PACKAGE https://github.com/jetruby/apollo_upload_server-ruby
WEB https://github.com/jetruby/apollo_upload_server-ruby/releases/tag/2.1.0
WEB https://github.com/rubysec/ruby-advisory-db/blob/master/gems/apollo_upload_server/CVE-2021-39880.yml
WEB https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39880.json
WEB https://gitlab.com/gitlab-org/gitlab/-/issues/330561
WEB https://gitlab.com/gitlab-org/gitlab/-/issues/330561#note_642879964
WEB https://vuldb.com/?id.183842

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: March 17, 2023

References

https://gitlab.com/gitlab-org/gitlab/-/issues/330561
https://hackerone.com/reports/1181284
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39880.json
Published: 2021-10-05T14:01:43
Last Modified: 2024-08-04T02:20:33.608Z
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