c-ares NAPTR Response ares_parse_naptr_reply` DNS Response information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in c-ares and classified as critical. The affected element is the function ares_parse_naptr_reply` of the component NAPTR Response Handler. The manipulation as part of DNS Response results in information disclosure. This vulnerability is identified as CVE-2017-1000381. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in c-ares (the affected version is unknown). Affected is the function ares_parse_naptr_reply` of the component NAPTR Response Handler. The manipulation as part of a DNS Response leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could be triggered to read memory outside of the given input buffer if the passed in DNS response packet was crafted in a particular way.

The bug was discovered 06/20/2017. The weakness was released 07/07/2017 (Website). The advisory is shared for download at c-ares.haxx.se. This vulnerability is traded as CVE-2017-1000381 since 07/07/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

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 101006 (Debian DLA-998-1 : c-ares 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 196887 (Ubuntu Security Notification for C-ares Vulnerability (USN-3395-1)).

Upgrading 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 (101006) and SecurityFocus (BID 99148†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.7

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 101006
Nessus Name: Debian DLA-998-1 : c-ares security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for c-ares FEDORA-2017-ba1399832b
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/20/2017 🔍
06/20/2017 +0 days 🔍
06/22/2017 +2 days 🔍
06/23/2017 +1 days 🔍
07/07/2017 +14 days 🔍
07/07/2017 +0 days 🔍
07/07/2017 +0 days 🔍
07/08/2017 +1 days 🔍
12/31/2020 +1272 days 🔍

Sourcesinfo

Advisory: c-ares.haxx.se
Researcher: LCatro
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-1000381 (🔍)
GCVE (CVE): GCVE-0-2017-1000381
GCVE (VulDB): GCVE-100-103296
SecurityFocus: 99148 - C-ares CVE-2017-1000381 Out of Bounds Read Information Disclosure Vulnerability

Entryinfo

Created: 07/08/2017 16:54
Updated: 12/31/2020 10:32
Changes: 07/08/2017 16:54 (72), 10/24/2019 06:49 (6), 12/31/2020 10:32 (3)
Complete: 🔍
Cache ID: 216:838:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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