01 Record

CVE-2015-9096

Net::SMTP in Ruby before 2.4.0 is vulnerable to SMTP command injection via CRLF sequences in a RCPT TO or MAIL FROM command, as demonstrated by CRLF sequences immediately before and after a DATA

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

Net::SMTP in Ruby before 2.4.0 is vulnerable to SMTP command injection via CRLF sequences in a RCPT TO or MAIL FROM command, as demonstrated by CRLF sequences immediately before and after a DATA

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 3.68% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 89.3% of scored records. A rank, not a probability.
NVD base score: 6.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2017-06-12 20:00Z9 YR AGO

Last updated

2024-08-06 08:36Z2 YR AGO

Reserved

2017-06-12

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')Base
CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')Base

Data version

5.1

Document digest

4c9983c6b3a7ab7c1b9c39a5d4ebf27d5c437b673fc4b651524572fbf5ac93fc

05 Affected products

VendorProductVersionsPlatforms

redhatcloudforms_managementengineNot specified—

redhatenterprise_linuxNot specified—

redhathummingbirdNot specified—

redhatrhel_software_collectionsNot specified—

rhel_sam1Not specified—

ruby-langrubyNot specified—

06 References

www.debian.orgDSA-3966https://www.debian.org/security/2017/dsa-3966vendor-advisoryx_refsource_DEBIAN
hackerone.comhttps://hackerone.com/reports/137631x_refsource_MISC
lists.debian.org[debian-lts-announce] 20180714 [SECURITY] [DLA 1421-1] ruby2.1 security updatehttps://lists.debian.org/debian-lts-announce/2018/07/msg00012.htmlmailing-listx_refsource_MLIST
github.comhttps://github.com/rubysec/ruby-advisory-db/issues/215x_refsource_MISC
github.comhttps://github.com/ruby/ruby/commit/0827a7e52ba3d957a634b063bf5a391239b9ffeex_refsource_MISC
www.mbsd.jphttp://www.mbsd.jp/Whitepaper/smtpi.pdfx_refsource_MISC

07 Fixed in

Ubuntu 14.04 LTS

ruby1.9.1
Fixed in 1.9.3.484-2ubuntu1.3
ruby2.0
Fixed in 2.0.0.484-1ubuntu2.4

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

ruby2.3
Fixed in 2.3.1-2~16.04.2

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.