yajl-ruby gem 1.3.0 on Ruby yajl_encode.c Yajl::Parser.new.parse format string

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as problematic has been found in yajl-ruby gem 1.3.0 on Ruby (Ruby Gem). This affects the function Yajl::Parser.new.parse of the file yajl_encode.c. The manipulation with an unknown input leads to a format string vulnerability. CWE is classifying the issue as CWE-134. The software uses a function that accepts a format string as an argument, but the format string originates from an external source. This is going to have an impact on availability.

The bug was discovered 11/02/2017. The weakness was published 11/03/2017 (Website). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2017-16516 since 11/03/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 104464 (Debian DLA-1167-1 : ruby-yajl 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 local.

Upgrading eliminates this vulnerability. A possible mitigation has been published 5 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (104464).




CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Format string
CWE: CWE-134 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 104464
Nessus Name: Debian DLA-1167-1 : ruby-yajl security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

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


11/02/2017 🔍
11/03/2017 +1 days 🔍
11/03/2017 +0 days 🔍
11/03/2017 +0 days 🔍
11/04/2017 +1 days 🔍
11/08/2017 +4 days 🔍
11/09/2017 +1 days 🔍
01/06/2023 +1884 days 🔍


Advisory: 176
Status: Not defined

CVE: CVE-2017-16516 (🔍)


Created: 11/04/2017 04:33 PM
Updated: 01/06/2023 10:09 AM
Changes: 11/04/2017 04:33 PM (67), 12/04/2019 01:45 PM (3), 01/06/2023 10:04 AM (4), 01/06/2023 10:09 AM (1)
Complete: 🔍


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