RubyGems up to 2.6.12 gem Escape Sequence code injection

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in RubyGems up to 2.6.12. This affects an unknown function of the component gem Handler. Executing a manipulation as part of Escape Sequence can lead to code injection. This vulnerability appears as CVE-2017-0899. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in RubyGems up to 2.6.12 (Programming Language Software). This vulnerability affects an unknown code block of the component gem Handler. The manipulation as part of a Escape Sequence leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

RubyGems version 2.6.12 and earlier is vulnerable to maliciously crafted gem specifications that include terminal escape characters. Printing the gem specification would execute terminal escape sequences.

The bug was discovered 08/29/2017. The weakness was presented 08/31/2017 (Website). The advisory is shared for download at blog.rubygems.org. This vulnerability was named CVE-2017-0899 since 11/30/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 103472 (Debian DLA-1114-1 : ruby1.9.1 security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176143 (Debian Security Update for ruby2.3 (DSA 3966-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (103472), SecurityFocus (BID 100576†) and CERT Bund (WID-SEC-2026-1421). See VDB-106032, VDB-106049, VDB-106050 and VDB-106051 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source CentOS
  • Red Hat Enterprise Linux
  • Open Source Ruby
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 103472
Nessus Name: Debian DLA-1114-1 : ruby1.9.1 security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53376
OpenVAS Name: Debian Security Advisory DSA 3966-1 (ruby2.3 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: github.com

Timelineinfo

11/30/2016 🔍
08/29/2017 +272 days 🔍
08/31/2017 +2 days 🔍
08/31/2017 +0 days 🔍
08/31/2017 +0 days 🔍
09/01/2017 +1 days 🔍
09/26/2017 +25 days 🔍
09/27/2017 +1 days 🔍
05/10/2026 +3147 days 🔍

Sourcesinfo

Product: github.com

Advisory: RHSA-2017:3485
Researcher: Yusuke Endoh.
Status: Confirmed

CVE: CVE-2017-0899 (🔍)
GCVE (CVE): GCVE-0-2017-0899
GCVE (VulDB): GCVE-100-106048

OVAL: 🔍

SecurityFocus: 100576 - RubyGems CVE-2017-0899 Security Bypass Vulnerability
SecurityTracker: 1039249
CERT Bund: WID-SEC-2026-1421 - Ruby: Mehrere Schwachstellen

See also: 🔍

Entryinfo

Created: 09/01/2017 09:03
Updated: 05/10/2026 11:47
Changes: 09/01/2017 09:03 (71), 11/12/2019 15:18 (11), 01/10/2021 14:24 (2), 01/10/2021 14:31 (1), 12/27/2022 14:18 (4), 05/10/2026 11:47 (23)
Complete: 🔍
Cache ID: 216::103

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