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CVE-2023-27530

HIGH
7.5
CVSS Score
Published: March 10, 2023 at 12:00 AM UTC
Updated: October 24, 2026 at 01:10 PM UTC
2 products affected across 2 vendorsDebian LinuxRack

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.011.0
Rack· Rackrubygems
95%
v < 2.0.9.32.1.0 ≤ v < 2.1.4.32.2.0 ≤ v < 2.2.6.33.0.0 ≤ v < 3.0.4.22.0.9.32.1.4.32.2.6.33.0.4.2
Affected range stops below 2.0.9.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.1.4.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.2.6.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.4.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

PatchVendor Advisory
Source: [email protected]
https://discuss.rubyonrails.org/t/cve-2023-27530-possible-dos-vulnerability-in-multipart-mime-parsing/82388
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html
Source: [email protected]
https://security.netapp.com/advisory/ntap-20231208-0015/
Vendor AdvisoryThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2023/dsa-5530

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400CWE-770

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