CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

A vulnerability classified as problematic has been found in uClibc-ng up to 1.0.11. This affects the function _decode_dotted of the file libc/inet/resolv.c of the component DNS Reply Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

The __decode_dotted function in libc/inet/resolv.c in uClibc-ng before 1.0.12 allows remote DNS servers to cause a denial of service (infinite loop) via vectors involving compressed items in a reply.

The bug was discovered 05/02/2016. The weakness was published 03/24/2017 by Daniel Fahlgren (oss-sec). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2016-2224 since 02/05/2016. 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. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 85 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 92568 (Debian DLA-561-1 : uclibc 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.

Upgrading to version 1.0.12 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (92568) and SecurityFocus (BID 82903†). Similar entry is available at VDB-98506. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• uClibc-ng

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8
• 1.0.9
• 1.0.10
• 1.0.11

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 92568
Nessus Name: Debian DLA-561-1 : uclibc security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: uClibc-ng 1.0.12
Patch: repo.or.cz

Timelineinfo

02/05/2016 🔍
02/05/2016 +0 days 🔍
05/02/2016 +87 days 🔍
07/26/2016 +85 days 🔍
07/27/2016 +1 days 🔍
03/24/2017 +240 days 🔍
03/24/2017 +0 days 🔍
03/24/2017 +0 days 🔍
11/15/2022 +2062 days 🔍

Sourcesinfo

Advisory: d9c3a16dcab57d6b56225b9a67e9119cc9e2e4ac
Researcher: Daniel Fahlgren
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-2224 (🔍)
GCVE (CVE): GCVE-0-2016-2224
GCVE (VulDB): GCVE-100-98505
SecurityFocus: 82903 - Uclibc-ng Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 03/24/2017 06:55 PM
Updated: 11/15/2022 09:10 AM
Changes: 03/24/2017 06:55 PM (73), 10/15/2019 09:22 AM (2), 11/15/2022 09:10 AM (5)
Complete: 🔍
Cache ID: 18:1A1:40

Discussion

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