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

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in GNU C Library. The affected element is the function getanswer_r of the file /resolv/nss_dns/dns-host.c of the component DNS Response Handler. Such manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2015-1781. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

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†). The entries VDB-10583, VDB-73929, VDB-79344 and VDB-80610 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 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 (🔍)
GCVE (CVE): GCVE-0-2015-1781
GCVE (VulDB): GCVE-100-75092
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

See also: 🔍

Entryinfo

Created: 04/22/2015 13:05
Updated: 05/09/2022 15:14
Changes: 04/22/2015 13:05 (74), 06/27/2017 03:31 (9), 05/09/2022 15:04 (4), 05/09/2022 15:08 (1), 05/09/2022 15:14 (1)
Complete: 🔍
Cache ID: 216:303:103

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