medium
6.5
CWE
121 125 119
Advisory Published
CVE Published
CVE Published
Updated

CVE-2023-4527: Glibc: stack read overflow in getaddrinfo in no-aaaa mode

First published: Fri Aug 25 2023(Updated: )

A 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.

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
debian/glibc<=2.36-9+deb12u2
2.28-10+deb10u1
2.28-10+deb10u2
2.31-13+deb11u6
2.31-13+deb11u7
2.36-9+deb12u3
2.37-12
ubuntu/glibc<2.37-0ubuntu2.1
2.37-0ubuntu2.1
ubuntu/glibc<2.38-1ubuntu5
2.38-1ubuntu5
GNU C Library<2.39
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=9.0
GNU C Library (glibc)<2.39
Red Hat CodeReady Linux Builder=9.2
Red Hat CodeReady Linux Builder for Power, little endian=9.0_ppc64le
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support=9.2_ppc64le
Red Hat CodeReady Linux Builder for ARM 64=9.0_aarch64
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support=9.2_aarch64
Red Hat CodeReady Linux Builder for IBM z Systems=9.0_s390x
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support=9.2_s390x
Red Hat Enterprise Linux Server EUS=8.8
Red Hat Enterprise Linux Server EUS=9.2
Red Hat Enterprise Linux=9.0_aarch64
Red Hat Enterprise Linux for ARM64 EUS=9.2_aarch64
Red Hat Enterprise Linux for IBM Z Systems=8.0_s390x
Red Hat Enterprise Linux for IBM Z Systems (s390x)=8.8_s390x
Red Hat Enterprise Linux for IBM Z Systems (s390x)=9.2
Red Hat Enterprise Linux for IBM Z Systems (s390x)=9.2
Red Hat Enterprise Linux for Power, little endian=8.0_ppc64le
Red Hat Enterprise Linux for Power, little endian=9.2_ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support=8.8_ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support=9.2_ppc64le
Red Hat Enterprise Linux Server=9.2
Red Hat Enterprise Linux for SAP Applications for Power, little endian - Extended Update Support=9.2_ppc64le
Red Hat Enterprise Linux=8.8
Red Hat Fedora=37
Red Hat Fedora=38
Red Hat Fedora=39
All of
NetApp H300S Firmware
NetApp H300S Firmware
All of
NetApp H500e Firmware
NetApp H500e Firmware
All of
NetApp H700S
NetApp H700S
All of
NetApp H410S
NetApp H410S Firmware
All of
NetApp H410C
NetApp H410C Firmware
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2

Remedy

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4ea972b7edd7e36610e8cde18bf7a8149d7bac4f (2.36)

Remedy

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b7529346025a130fee483d42178b5c118da971bb (2.37)

Remedy

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b25508dd774b617f99419bdc3cf2ace4560cd2d6 (2.38)

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2023-4527?

    CVE-2023-4527 is a vulnerability found in glibc that allows for a stack read overflow in the getaddrinfo function.

  • What is the severity of CVE-2023-4527?

    CVE-2023-4527 has a severity score of 8.2, indicating a high severity.

  • How does CVE-2023-4527 affect GNU glibc?

    CVE-2023-4527 affects GNU glibc up to version 2.39.

  • How does CVE-2023-4527 affect Redhat Enterprise Linux?

    CVE-2023-4527 affects Redhat Enterprise Linux versions 8.0 and 9.0.

  • How can CVE-2023-4527 be fixed?

    Updating to a version of glibc that is not affected by CVE-2023-4527 is recommended.

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