Glibc: stack read overflow in getaddrinfo in no-aaaa mode

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Summary

CVECVE-2023-4527
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-09-18 17:15:55 UTC
Updated2026-05-12 11:16:15 UTC
DescriptionA flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data, and may cause a crash.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

Problem Types: CWE-121 | CWE-125 | CWE-121 Stack-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gnu Glibc All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:2.28-225.el8_8.6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:2.28-225.el8_8.6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:2.34-60.el9_2.7 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:2.34-60.el9_2.7 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified

References

ReferenceSourceLinkTags
Red Hat af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Red Hat af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
2234712 – (CVE-2023-4527) CVE-2023-4527 glibc: Stack read overflow in getaddrinfo in no-aaaa mode af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Exploit, Issue Tracking, Third Party Advisory
cve-details af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-082556.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
glibc: Multiple vulnerabilities (GLSA 202310-03) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[SECURITY] Fedora 38 Update: glibc-2.37-10.fc38 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-831302.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
oss-security - CVE-2023-4527: glibc: Stack read overflow in getaddrinfo in no-aaaa mode af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
[SECURITY] Fedora 39 Update: glibc-2.38-6.fc39 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
[SECURITY] Fedora 37 Update: glibc-2.36-14.fc37 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org Mailing List, Third Party Advisory
security.netapp.com/advisory/ntap-20231116-0012 af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: This issue was discovered by Florian Weimer (Red Hat). (en)

Additional Advisory Data

SourceTimeEvent
CNA2023-08-24T00:00:00.000ZReported to Red Hat.
CNA2023-09-12T00:00:00.000ZMade public.

Workarounds

CNA: Removing the no-aaaa diagnostic option from /etc/resolv.conf will mitigate this flaw.

Legacy QID Mappings

  • 160965 Oracle Enterprise Linux Security Update for glibc (ELSA-2023-5455)
  • 160968 Oracle Enterprise Linux Security Update for glibc (ELSA-2023-5453)
  • 160973 Oracle Enterprise Linux Security Update for glibc (ELSA-2023-12872)
  • 160974 Oracle Enterprise Linux Security Update for glibc (ELSA-2023-12873)
  • 199798 Ubuntu Security Notification for GNU C Library Vulnerabilities (USN-6409-1)
  • 242111 Red Hat Update for glibc (RHSA-2023:5453)
  • 242118 Red Hat Update for glibc (RHSA-2023:5455)
  • 284570 Fedora Security Update for glibc (FEDORA-2023-2b8c11ee75)
  • 284571 Fedora Security Update for glibc (FEDORA-2023-028062484e)
  • 285226 Fedora Security Update for glibc (FEDORA-2023-63e5a77522)
  • 356310 Amazon Linux Security Advisory for glibc : ALAS2023-2023-359
  • 378929 Alibaba Cloud Linux Security Update for glibc (ALINUX3-SA-2023:0124)
  • 6000014 Debian Security Update for glibc (DSA 5514-1)
  • 6140299 AWS Bottlerocket Security Update for glibc (GHSA-j8jx-vx9f-w72c)
  • 710764 Gentoo Linux glibc Multiple Vulnerabilities (GLSA 202310-03)
  • 941278 AlmaLinux Security Update for glibc (ALSA-2023:5455)
  • 941283 AlmaLinux Security Update for glibc (ALSA-2023:5453)
  • 961035 Rocky Linux Security Update for glibc (RLSA-2023:5455)
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