ISC BIND up to 9.7.7/9.10.2-P1 Zone Query name.c code

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.
6.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in ISC BIND up to 9.7.7/9.10.2-P1. Affected is an unknown function of the file name.c of the component Zone Query Handler. This manipulation causes denial of service. The identification of this vulnerability is CVE-2015-4620. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in ISC BIND up to 9.7.7/9.10.2-P1 (Domain Name Software). Affected by this vulnerability is an unknown code of the file name.c of the component Zone Query Handler. The manipulation with an unknown input leads to a code vulnerability. The CWE definition for the vulnerability is CWE-17. As an impact it is known to affect availability. The summary by CVE is:

name.c in named in ISC BIND 9.7.x through 9.9.x before 9.9.7-P1 and 9.10.x before 9.10.2-P2, when configured as a recursive resolver with DNSSEC validation, allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) by constructing crafted zone data and then making a query for a name in that zone.

The weakness was shared 07/08/2015 (Website). It is possible to read the advisory at kb.isc.org. This vulnerability is known as CVE-2015-4620 since 06/16/2015. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 84599 (Debian DSA-3304-1 : bind9 - 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185107 (HP-UX Running BIND Remote Denial of Service Vulnerability(HPSBUX03379)).

Upgrading to version 9.9.7-P1 or 9.10.2-P2 eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 20716.

The vulnerability is also documented in the databases at X-Force (104434), Tenable (84599), SecurityFocus (BID 75588†) and Vulnerability Center (SBV-51051†). Additional details are provided at packetstormsecurity.com. The entry VDB-69191 is related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Code
CWE: CWE-17
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 84599
Nessus Name: Debian DSA-3304-1 : bind9 - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 703304
OpenVAS Name: Debian Security Advisory DSA 3304-1 (bind9 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: BIND 9.9.7-P1/9.10.2-P2
TippingPoint: 🔍
Fortigate IPS: 🔍

Timelineinfo

06/16/2015 🔍
06/29/2015 +13 days 🔍
07/07/2015 +8 days 🔍
07/08/2015 +1 days 🔍
07/08/2015 +0 days 🔍
07/08/2015 +0 days 🔍
07/09/2015 +1 days 🔍
07/09/2015 +0 days 🔍
05/23/2022 +2510 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: USN-2669-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4620 (🔍)
GCVE (CVE): GCVE-0-2015-4620
GCVE (VulDB): GCVE-100-76339

OVAL: 🔍

X-Force: 104434 - ISC BIND DNSSEC denial of service
SecurityFocus: 75588 - ISC BIND 'isselfsigned()' Function Remote Denial of Service Vulnerability
SecurityTracker: 1032799
Vulnerability Center: 51051 - ISC BIND Remote DoS via Crafted Zone Data, High

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 07/09/2015 09:49
Updated: 05/23/2022 16:48
Changes: 07/09/2015 09:49 (73), 07/10/2017 09:07 (11), 05/23/2022 16:35 (4), 05/23/2022 16:41 (1), 05/23/2022 16:48 (1)
Complete: 🔍
Cache ID: 216:CD2:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!