CVE-2023-4806 Glibc: potential use-after-free in getaddrinfo()

2023-09-1816:33:57

CWE-416

redhat

www.cve.org

cve-2023-4806

glibc

use-after-free

getaddrinfo

nss module

application crash

ipv6

ipv4

af_inet6

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

6.8 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

40.9%

JSON

A flaw was found 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.

CNA Affected

[
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "glibc",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:2.28-225.el8_8.6",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:8::crb",
      "cpe:/o:redhat:enterprise_linux:8::baseos",
      "cpe:/a:redhat:enterprise_linux:8::appstream"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "glibc",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:2.28-225.el8_8.6",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:enterprise_linux:8::crb",
      "cpe:/o:redhat:enterprise_linux:8::baseos",
      "cpe:/a:redhat:enterprise_linux:8::appstream"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.6 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "glibc",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:2.28-189.8.el8_6",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_eus:8.6::baseos",
      "cpe:/a:redhat:rhel_eus:8.6::crb",
      "cpe:/a:redhat:rhel_eus:8.6::appstream",
      "cpe:/o:redhat:rhev_hypervisor:4.4::el8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "glibc",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:2.34-60.el9_2.7",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9::baseos",
      "cpe:/a:redhat:enterprise_linux:9::crb",
      "cpe:/a:redhat:enterprise_linux:9::appstream"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "glibc",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:2.34-60.el9_2.7",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9::baseos",
      "cpe:/a:redhat:enterprise_linux:9::crb",
      "cpe:/a:redhat:enterprise_linux:9::appstream"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "glibc",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:2.28-189.8.el8_6",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_eus:8.6::baseos",
      "cpe:/a:redhat:rhel_eus:8.6::crb",
      "cpe:/a:redhat:rhel_eus:8.6::appstream",
      "cpe:/o:redhat:rhev_hypervisor:4.4::el8"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 6",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "compat-glibc",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:6"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 6",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "glibc",
    "defaultStatus": "unknown",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:6"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "compat-glibc",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "glibc",
    "defaultStatus": "affected",
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7"
    ]
  }
]