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CVE-2023-4806

Glibc: potential use-after-free in getaddrinfo()

CVSS score

5.9

EPSS probability

%1.6

Risk score

0.1

Published

3 y ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach CVE AI Research

CVE-2023-4806 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2023-4806 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1Red HatRed Hat Enterprise Linux 8 View
2Red HatRed Hat Enterprise Linux 8.6 Extended Update Support View
3Red HatRed Hat Enterprise Linux 9 View
4Red HatRed Hat Virtualization 4 for Red Hat Enterprise Linux 8 View
5Red HatRed Hat Enterprise Linux 6 View
6Red HatRed Hat Enterprise Linux 7 View
7gnuglibc View
8redhatcodeready linux builder eus View
9redhatcodeready linux builder eus for power little endian View
10redhatcodeready linux builder eus for power little endian eus View
11redhatcodeready linux builder for arm64 View
12redhatcodeready linux builder for arm64 eus View
13redhatcodeready linux builder for ibm z systems View
14redhatcodeready linux builder for ibm z systems eus View
15redhatenterprise linux View
16redhatenterprise linux View
17redhatenterprise linux View
18redhatenterprise linux eus View
19redhatenterprise linux eus View
20redhatenterprise linux for arm 64 View
21redhatenterprise linux for arm 64 eus View
22redhatenterprise linux for ibm z systems View
23redhatenterprise linux for ibm z systems eus View
24redhatenterprise linux for ibm z systems eus s390x View
25redhatenterprise linux for ibm z systems s390x View
26redhatenterprise linux for power little endian View
27redhatenterprise linux for power little endian View
28redhatenterprise linux for power little endian eus View
29redhatenterprise linux for power little endian eus View
30redhatenterprise linux server aus View
31redhatenterprise linux server for power little endian update services for sap solutions View
32redhatenterprise linux tus View
33fedoraprojectfedora View
34fedoraprojectfedora View
35fedoraprojectfedora View
Total affected vendors: 4|Products: 35

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.9CVSS V31MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HNVD
5.9CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-4806 is associated with the following CWEs:

CWE-416: Use After Free

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-4806 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

RHSA-2023:5453vendor-advisoryRHSA-2023:5455vendor-advisoryRHSA-2023:7409vendor-advisoryhttps://access.redhat.com/security/cve/CVE-2023-4806vendor-advisoryRHBZ#2237782vendor-advisoryhttp://www.openwall.com/lists/oss-security/2023/10/03/4nvdhttp://www.openwall.com/lists/oss-security/2023/10/03/5nvdhttp://www.openwall.com/lists/oss-security/2023/10/03/6nvdhttp://www.openwall.com/lists/oss-security/2023/10/03/8nvdhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/nvd

CVSS Vector Radar Chart

5.9 / 10
Attack VectorNetworkComplexityHighPrivilegesNoneUser Interact.NoneConfidentialityHighIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)High
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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RH
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G
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gnu
R
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F
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fedoraproject

Weakness Type (CWE & CAPEC)

CWE-416

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