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ubuntucveUbuntu.comUB:CVE-2023-4813
HistorySep 12, 2023 - 12:00 a.m.

CVE-2023-4813

2023-09-1200:00:00
ubuntu.com
ubuntu.com
14
glibc
application crash
freed memory
getaddrinfo function
nsswitch.conf
bug
non-default configuration

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

6.4 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

48.9%

A flaw was found in glibc. In an uncommon situation, the gaih_inet function
may use memory that has been freed, resulting in an application crash. This
issue is only exploitable when the getaddrinfo function is called and the
hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or
SUCCESS=merge.

Bugs

Notes

Author Note
Priority reason: Uncommong situation
mdeslaur requires a non-default configuration in /etc/nsswitch.conf
OSVersionArchitecturePackageVersionFilename
ubuntu14.04noarcheglibc< anyUNKNOWN
ubuntu18.04noarchglibc< 2.27-3ubuntu1.6+esm1UNKNOWN
ubuntu20.04noarchglibc< 2.31-0ubuntu9.14UNKNOWN
ubuntu22.04noarchglibc< 2.35-0ubuntu3.5UNKNOWN
ubuntu16.04noarchglibc< 2.23-0ubuntu11.3+esm5UNKNOWN

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

6.4 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

48.9%