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CVE-2013-0183· NVD / CVE Program· CNA redhat

multipart/parser.rb in Rack 1.3.x before 1.3.8 and 1.4.x before 1.4.3 allows remote attackers to cause a denial of service (memory consumpti

multipart/parser.rb in Rack 1.3.x before 1.3.8 and 1.4.x before 1.4.3 allows remote attackers to cause a denial of service (memory consumption and out-of-memory error) via a long string in a Multipart HTTP packet.

MediumCVSS 5.0 · v2.0—No exploit Fix available
Published
Mar 1, 2013
Updated
Jun 16, 2026
EPSS
3.8% · 90th percentile
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Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
20 / 40 · 5.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.8%

Affected systems

VendorProduct
rack projectrack

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • rack project rack1.3.0
  • rack project rack1.3.1
  • rack project rack1.3.2
  • rack project rack1.3.3
  • rack project rack1.3.4
  • rack project rack1.3.5
  • rack project rack1.3.6
  • rack project rack1.3.7
  • rack project rack1.4.0
  • rack project rack1.4.1
  • rack project rack1.4.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12ruby-rackbefore 1.4.1-2.11.4.1-2.1
Debian:6.0librack-rubybefore 1.1.0-4+squeeze11.1.0-4+squeeze1
RubyGemsrackfrom 1.3.0 · before 1.3.81.3.8
RubyGemsrackfrom 1.4.0 · before 1.4.31.4.3

Same product

rack project: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-30123A sequence injection vulnerability exists in Rack <2.0.9.1, <2.1.4.1 and <2.2.3.1 which could allow is a possible shell escape in the Lint a
    41Plan
  • CVE-2020-8161A directory traversal vulnerability exists in rack < 2.2.0 that allows an attacker perform directory traversal vulnerability in the Rack::Di
    35Monitor
  • CVE-2022-30122A possible denial of service vulnerability exists in Rack <2.0.9.1, <2.1.4.1 and <2.2.3.1 in the multipart parsing component of Rack.
    31Monitor
  • CVE-2020-8184A reliance on cookies without validation/integrity check security vulnerability exists in rack < 2.2.3, rack < 2.1.4 that makes it is possib
    31Monitor
  • CVE-2018-16470There is a possible DoS vulnerability in the multipart parser in Rack before 2.0.6.
    31Monitor
  • CVE-2018-16471There is a possible XSS vulnerability in Rack before 2.0.6 and 1.6.11.
    25Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:librack-ruby1.1.0-4+squeeze1 · Debian:6.0Package registry (OSV)
debian:ruby-rack1.4.1-2.1 · Debian:12Package registry (OSV)
RubyGems:rack1.3.8Package registry (OSV)
RubyGems:rack1.4.3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
P

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records