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CVE-2023-4527

MEDIUMCVSS 6.5/10EPSS 1.51%

Last modified

CVE-2023-4527 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
6.5/10

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

EPSS Probability
1.51%

71.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
GnuGlibc>= 2.36, < 2.36.113
GnuGlibc>= 2.37, < 2.37.38
GnuGlibc>= 2.38, < 2.38.19
RedhatCodeready Linux Builder Eus9.2
RedhatCodeready Linux Builder Eus For Power Little Endian9.0_ppc64le
RedhatCodeready Linux Builder Eus For Power Little Endian Eus9.2_ppc64le
RedhatCodeready Linux Builder For Arm649.0_aarch64
RedhatCodeready Linux Builder For Arm64 Eus9.2_aarch64
RedhatCodeready Linux Builder For Ibm Z Systems9.0_s390x
RedhatCodeready Linux Builder For Ibm Z Systems Eus9.2_s390x
RedhatEnterprise Linux8.0
RedhatEnterprise Linux9.0
RedhatEnterprise Linux Eus8.8
RedhatEnterprise Linux Eus9.2
RedhatEnterprise Linux For Arm 649.0_aarch64
RedhatEnterprise Linux For Arm 64 Eus9.2_aarch64
RedhatEnterprise Linux For Ibm Z Systems8.0_s390x
RedhatEnterprise Linux For Ibm Z Systems Eus8.8_s390x
RedhatEnterprise Linux For Ibm Z Systems Eus S390x9.2
RedhatEnterprise Linux For Ibm Z Systems S390x9.2
RedhatEnterprise Linux For Power Little Endian8.0_ppc64le
RedhatEnterprise Linux For Power Little Endian9.2_ppc64le
RedhatEnterprise Linux For Power Little Endian Eus8.8_ppc64le
RedhatEnterprise Linux For Power Little Endian Eus9.2_ppc64le
RedhatEnterprise Linux Server Aus9.2
RedhatEnterprise Linux Server For Power Little Endian Update Services For Sap Solutions9.2_ppc64le
RedhatEnterprise Linux Tus8.8
FedoraprojectFedora37
FedoraprojectFedora38
FedoraprojectFedora39
NetappH300s FirmwareAll versions
NetappH500s FirmwareAll versions
NetappH700s FirmwareAll versions
NetappH410s FirmwareAll versions
NetappH410c FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-4527?
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.
How severe is CVE-2023-4527?
CVE-2023-4527 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.
How do I fix CVE-2023-4527?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4527?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST