CVE-2023-27530: debian debian_linux Uncontrolled Resource Consumption
Vulnerability summary
CVE-2023-27530 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in debian debian_linux. EPSS estimates a 1.83% chance of exploitation in the next 30 days, higher than 78.8% of scored vulnerabilities.
Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 24 · Related 15Timeline
- 10-03-2023PublishedVulnerability first disclosed.
- 15-10-2024Last modifiedVulnerability information updated.
Description
A DoS vulnerability exists in Rack <v3.0.4.2, <v2.2.6.3, <v2.1.4.3 and <v2.0.9.3 within in the Multipart MIME parsing code in which could allow an attacker to craft requests that can be abuse to cause multipart parsing to take longer than expected.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · RubygemsEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.83%
Chance of exploitation in the next 30 days
Percentile
79%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.83% 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
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-770Allocation of Resources Without Limits or ThrottlingThe product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Suse4 products
- rubygem-rack&distro=SUSE Linux Enterprise High Availability Extension 15 SP1< 2.0.8-150000.3.15.1
- rubygem-rack&distro=SUSE Linux Enterprise High Availability Extension 15 SP2< 2.0.8-150000.3.15.1
- rubygem-rack&distro=SUSE Linux Enterprise High Availability Extension 15 SP3< 2.0.8-150000.3.15.1
- rubygem-rack&distro=SUSE Linux Enterprise High Availability Extension 15 SP4< 2.0.8-150000.3.15.1
Debian2 products
- ruby-rack< 2.2.6.4-1
- debian_linuxEOL10.0 | 11.0
Opensuse2 products
- rubygem-rack&distro=openSUSE Leap 15.4< 2.0.8-150000.3.15.1
- rubygem-rack&distro=openSUSE Tumbleweed< 3.0.4.2-1.1 | < 2.2.6.3-1.1
Rack1 product
- rack< 2.0.9.3 | ≥ 2.1.0, < 2.1.4.3 | ≥ 2.2.0, < 2.2.6.3 | ≥ 3.0.0, < 3.0.4.2
RubyGems1 product
- rack< 2.0.9.3 | ≥ 2.1.0, < 2.1.4.3 | ≥ 2.2.0, < 2.2.6.3 | ≥ 3.0.0, < 3.0.4.2
Ubuntu1 product
- ruby-rackAll versions (No fix recorded) | < 2.0.7-2ubuntu0.1+esm4 | < 2.1.4-5ubuntu1.1 | < 2.1.4-5ubuntu1+esm4
6 vendors · 11 products
References
17 links- discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388REPORTWEBPatchVendor Advisory
Show all 17 references
- github.com/rack/rackPACKAGE