InspIRCd up to 2.0.18 DNS PTR Response dns.cpp DNS::GetResult Hostname Split input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in InspIRCd up to 2.0.18. The affected element is the function DNS::GetResult of the file dns.cpp of the component DNS PTR Response Handler. Such manipulation of the argument Hostname with the input 2 leads to input validation (Split). This vulnerability is referenced as CVE-2015-8702. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in InspIRCd up to 2.0.18 and classified as critical. Affected by this issue is the function DNS::GetResult of the file dns.cpp of the component DNS PTR Response Handler. The manipulation of the argument hostname with the input value \032 leads to a input validation vulnerability (Split). Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

The DNS::GetResult function in dns.cpp in InspIRCd before 2.0.19 allows remote DNS servers to cause a denial of service (netsplit) via an invalid character in a PTR response, as demonstrated by a "\032" (whitespace) character in a hostname.

The weakness was published 04/12/2016 (Website). The advisory is shared for download at debian.org. This vulnerability is handled as CVE-2015-8702 since 12/28/2015. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 87897 (Debian DLA-384-1 : inspircd security and regression 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 175684 (Debian Security Update for inspircd (DSA 3527-1)).

Upgrading to version 2.0.19 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (87897). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.6
VulDB Temp Score: 8.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
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

Name: Split
Class: Input validation / Split
CWE: CWE-20
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: 87897
Nessus Name: Debian DLA-384-1 : inspircd security and regression update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 18627
OpenVAS Name: Gentoo Linux Local Check: https://security.gentoo.org/glsa/201512-13
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: InspIRCd 2.0.19
Patch: github.com

Timelineinfo

12/28/2015 🔍
01/12/2016 +15 days 🔍
01/13/2016 +1 days 🔍
04/12/2016 +89 days 🔍
04/12/2016 +0 days 🔍
04/13/2016 +1 days 🔍
11/08/2024 +3131 days 🔍

Sourcesinfo

Product: github.com

Advisory: 6058483d9fbc1b904d5ae7cfea47bfcde5c5b559
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-8702 (🔍)
GCVE (CVE): GCVE-0-2015-8702
GCVE (VulDB): GCVE-100-82220

OVAL: 🔍

Entryinfo

Created: 04/13/2016 10:01
Updated: 11/08/2024 04:25
Changes: 04/13/2016 10:01 (50), 10/05/2018 07:39 (25), 07/13/2022 19:58 (5), 11/08/2024 04:25 (18)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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