uClibc-ng up to 1.0.11 DNS Reply libc/inet/resolv.c _read_etc_hosts_r Crafted Packet resource consumption

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-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in uClibc-ng up to 1.0.11. Affected by this issue is the function _read_etc_hosts_r of the file libc/inet/resolv.c of the component DNS Reply Handler. Executing a manipulation as part of Crafted Packet can lead to resource consumption. This vulnerability is handled as CVE-2016-2225. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in uClibc-ng up to 1.0.11. This vulnerability affects the function _read_etc_hosts_r of the file libc/inet/resolv.c of the component DNS Reply Handler. The manipulation as part of a Crafted Packet leads to a resource consumption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

The __read_etc_hosts_r 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 a crafted packet.

The bug was discovered 05/02/2016. The weakness was released 03/24/2017 by Daniel Fahlgren (oss-sec). The advisory is available at openwall.com. This vulnerability was named CVE-2016-2225 since 02/05/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

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†). Entry connected to this vulnerability is available at VDB-98505. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

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

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

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: 6932f2282ba0578d6ca2f21eead920d6b78bc93c
Researcher: Daniel Fahlgren
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-2225 (🔍)
GCVE (CVE): GCVE-0-2016-2225
GCVE (VulDB): GCVE-100-98506
SecurityFocus: 82903 - Uclibc-ng Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 03/24/2017 18:56
Updated: 11/15/2022 09:11
Changes: 03/24/2017 18:56 (74), 10/15/2019 09:18 (2), 11/15/2022 09:11 (5)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!