GNU C Library DNS Response dns-host.c getanswer_r memory corruption

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.
7.0$0-$5k0.00

A vulnerability was found in GNU C Library (Software Library) (the affected version unknown) and classified as critical. Affected by this issue is the function getanswer_r of the file /resolv/nss_dns/dns-host.c of the component DNS Response Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 04/21/2015 with Red Hat as confirmed patch (Website). The advisory is shared for download at sourceware.org. This vulnerability is handled as CVE-2015-1781 since 02/17/2015. 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 83865 (Debian DLA-230-1 : eglibc 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 196484 (Ubuntu Security Notification for Eglibc, Glibc Vulnerabilities (USN-2985-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at sourceware.org. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 19687.

The vulnerability is also documented in the databases at Tenable (83865), SecurityFocus (BID 74255†), SecurityTracker (ID 1032178†) and Vulnerability Center (SBV-49835†).

Productinfo

Type

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 83865
Nessus Name: Debian DLA-230-1 : eglibc security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2015-617
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: sourceware.org
TippingPoint: 🔍
Fortigate IPS: 🔍

Timelineinfo

02/17/2015 🔍
04/21/2015 +63 days 🔍
04/21/2015 +0 days 🔍
04/21/2015 +0 days 🔍
04/21/2015 +0 days 🔍
04/22/2015 +1 days 🔍
04/22/2015 +0 days 🔍
05/28/2015 +36 days 🔍
09/28/2015 +123 days 🔍
05/09/2022 +2415 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: USN-2985-1
Organization: Red Hat
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-1781 (🔍)
SecurityFocus: 74255 - GNU glibc CVE-2015-1781 Multiple Buffer Overflow Vulnerabilities
SecurityTracker: 1032178 - Glibc Buffer Overflow in getanswer_r() Lets Remote Users Execute Arbitrary Code
Vulnerability Center: 49835 - GNU GLibC Remote Code Execution due to Passing Improper Input to gethostbyname_r() Function, Medium

Entryinfo

Created: 04/22/2015 01:05 PM
Updated: 05/09/2022 03:14 PM
Changes: 04/22/2015 01:05 PM (74), 06/27/2017 03:31 AM (9), 05/09/2022 03:04 PM (4), 05/09/2022 03:08 PM (1), 05/09/2022 03:14 PM (1)
Complete: 🔍
Cache ID: 35:C91:40

Discussion

No comments yet. Languages: en.

Please log in to comment.

Want to stay up to date on a daily basis?

Enable the mail alert feature now!