GNU C Library up to 11.0 on macOS link_ntoa memory corruption

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

Summaryinfo

A vulnerability has been found in GNU C Library 9.3/10.1/10.2/10.3/11.0 on macOS and classified as critical. This impacts the function link_ntoa. The manipulation leads to memory corruption. This vulnerability is documented as CVE-2016-6559. The attack can be initiated remotely. There is not any exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GNU C Library 9.3/10.1/10.2/10.3/11.0 on macOS (Software Library). This issue affects the function link_ntoa. 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 released 12/06/2016 as FreeBSD-SA-16:37.libc as confirmed security advisory (Website). It is possible to read the advisory at security.FreeBSD.org. The identification of this vulnerability is CVE-2016-6559. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The advisory points out:

A specially crafted argument can trigger a static buffer overflow in the library, with possibility to rewrite following static buffers that belong to other library functions.

The vulnerability scanner Nessus provides a plugin with the ID 95585 (FreeBSD : FreeBSD -- link_ntoa(3) buffer overflow (0282269d-bbee-11e6-b1cf-14dae9d210b8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95585), SecurityFocus (BID 94694†) and SecurityTracker (ID 1037398†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

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

NVD Base Score: 9.8
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

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: 95585
Nessus Name: FreeBSD : FreeBSD -- link_ntoa(3) buffer overflow (0282269d-bbee-11e6-b1cf-14dae9d210b8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Timelineinfo

08/03/2016 🔍
12/06/2016 +125 days 🔍
12/06/2016 +0 days 🔍
12/06/2016 +0 days 🔍
12/07/2016 +1 days 🔍
07/13/2018 +582 days 🔍
12/27/2024 +2359 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: FreeBSD-SA-16:37.libc
Status: Confirmed

CVE: CVE-2016-6559 (🔍)
GCVE (CVE): GCVE-0-2016-6559
GCVE (VulDB): GCVE-100-93971
CERT: 🔍
SecurityFocus: 94694
SecurityTracker: 1037398 - libc link_ntoa() Buffer Overflow Lets Users Execute Arbitrary Code

Entryinfo

Created: 12/07/2016 10:38
Updated: 12/27/2024 13:59
Changes: 12/07/2016 10:38 (46), 02/15/2019 13:53 (16), 10/05/2022 08:06 (3), 10/05/2022 08:10 (11), 10/05/2022 08:15 (1), 12/27/2024 13:59 (15)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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