// For flags

CVE-2014-9402

glibc: denial of service in getnetbyname function

Severity Score

7.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

3
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The nss_dns implementation of getnetbyname in GNU C Library (aka glibc) before 2.21, when the DNS backend in the Name Service Switch configuration is enabled, allows remote attackers to cause a denial of service (infinite loop) by sending a positive answer while a network name is being process.

La implementación nss_dns de getnetbyname en GNU C Library (también conocido como glibc) anterior a 2.21, cuando el backend DNS en la configuración Name Service Switch está habilitado, permite a atacantes remotos causar una denegación de servicio (bucle infinito) mediante el envió de una respuesta positiva mientras el nombre de una red está siendo procesada.

Arnaud Le Blanc discovered that the GNU C Library incorrectly handled file descriptors when resolving DNS queries under high load. This may cause a denial of service in other applications, or an information leak. This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. It was discovered that the GNU C Library incorrectly handled receiving a positive answer while processing the network name when performing DNS resolution. A remote attacker could use this issue to cause the GNU C Library to hang, resulting in a denial of service. Various other issues were also addressed.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
Attack Vector
Local
Attack Complexity
High
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2014-12-17 CVE Reserved
  • 2015-02-24 CVE Published
  • 2019-06-13 First Exploit
  • 2024-08-06 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-399: Resource Management Errors
  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Gnu
Search vendor "Gnu"
 Glibc
Search vendor "Gnu" for product "Glibc"
 <= 2.20
Search vendor "Gnu" for product "Glibc" and version " <= 2.20"
-
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 10.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "10.04"
lts
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 12.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"
lts
Affected
Canonical
Search vendor "Canonical"
 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 14.04
Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"
lts
Affected
Canonical
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 Ubuntu Linux
Search vendor "Canonical" for product "Ubuntu Linux"
 14.10
Search vendor "Canonical" for product "Ubuntu Linux" and version "14.10"
-
Affected
Opensuse
Search vendor "Opensuse"
 Opensuse
Search vendor "Opensuse" for product "Opensuse"
 13.1
Search vendor "Opensuse" for product "Opensuse" and version "13.1"
-
Affected
Opensuse
Search vendor "Opensuse"
 Opensuse
Search vendor "Opensuse" for product "Opensuse"
 13.2
Search vendor "Opensuse" for product "Opensuse" and version "13.2"
-
Affected