ISC BIND 9.9.0/9.10.0/9.10.1-P1 Socket Error resolver.c race condition

CVSS Meta Temp Score
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5.2$0-$5k0.00

A vulnerability was found in ISC BIND 9.9.0/9.10.0/9.10.1-P1 (Domain Name Software). It has been rated as problematic. Affected by this issue is some unknown functionality of the file resolver.c of the component Socket Error Handler. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is availability. CVE summarizes:

Race condition in resolver.c in named in ISC BIND 9.9.8 before 9.9.8-P2 and 9.10.3 before 9.10.3-P2 allows remote attackers to cause a denial of service (INSIST assertion failure and daemon exit) via unspecified vectors.

The weakness was disclosed 12/15/2015 as AA-01319 as confirmed advisory (Website). The advisory is available at kb.isc.org. This vulnerability is handled as CVE-2015-8461 since 12/02/2015. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The advisory points out:

An uncommonly occurring condition can cause affected servers to exit with an INSIST failure depending on the outcome of a race condition in resolver.c While difficult to exploit reliably, a malicious party could, through deliberate behavior, significantly increase the probability of encountering the triggering condition, resulting in denial-of-service to clients if successful.

The vulnerability scanner Nessus provides a plugin with the ID 87503 (ISC BIND 9.9.8 < 9.9.8-P2 / 9.10.3 < 9.10.3-P2 Socket Error Handling DoS), which helps to determine the existence of the flaw in a target environment. It is assigned to the family DNS and running in the context r.

Upgrading to version 9.9.8-P2, 9.10.3-P2 or 9.9.8-S3 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (108949), Tenable (87503), SecurityFocus (BID 79347†) and Vulnerability Center (SBV-55317†). The entry VDB-79801 is pretty similar.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 87503
Nessus Name: ISC BIND 9.9.8 < 9.9.8-P2 / 9.10.3 < 9.10.3-P2 Socket Error Handling DoS
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 100313
OpenVAS Name: Amazon Linux Local Check: alas-2015-631
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: BIND 9.9.8-P2/9.10.3-P2/9.9.8-S3

Timelineinfo

12/02/2015 🔍
12/15/2015 +13 days 🔍
12/15/2015 +0 days 🔍
12/16/2015 +1 days 🔍
12/16/2015 +0 days 🔍
12/16/2015 +0 days 🔍
12/17/2015 +1 days 🔍
12/18/2015 +1 days 🔍
07/01/2022 +2387 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: AA-01319
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-8461 (🔍)
X-Force: 108949 - ISC BIND resolver.c denial of service
SecurityFocus: 79347
SecurityTracker: 1034419
Vulnerability Center: 55317 - ISC BIND Remote DoS due to Race Condition in Resolver.c, Medium

See also: 🔍

Entryinfo

Created: 12/16/2015 10:17 AM
Updated: 07/01/2022 08:26 AM
Changes: 12/16/2015 10:17 AM (71), 05/15/2018 09:19 AM (8), 07/01/2022 08:26 AM (3)
Complete: 🔍
Cache ID: 18:191:40

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