5.9

CVE-2023-4806

A flaw has been identified in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags.

Data is provided by the National Vulnerability Database (NVD)
Gnu ≫ Glibc Version2.33
Redhat ≫ Codeready Linux Builder For Arm64 Version9.0_aarch64
Redhat ≫ Enterprise Linux Version7.0
Redhat ≫ Enterprise Linux Version8.0
Redhat ≫ Enterprise Linux Version9.0
Redhat ≫ Enterprise Linux Eus Version8.8
Redhat ≫ Enterprise Linux Eus Version9.2
Redhat ≫ Enterprise Linux For Arm 64 Version9.0_aarch64
Redhat ≫ Enterprise Linux For Arm 64 Eus Version9.2_aarch64
Redhat ≫ Enterprise Linux Tus Version8.8
Fedoraproject ≫ Fedora Version37
Fedoraproject ≫ Fedora Version38
Fedoraproject ≫ Fedora Version39
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 1.9% 0.826
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 5.9 2.2 3.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
secalert@redhat.com 5.9 2.2 3.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://bugzilla.redhat.com/show_bug.cgi?id=2237782
Third Party Advisory
Issue Tracking