Login Request a demo
Medium severity · published Sep 18, 2023
CVE-2023-4527
Glibc: stack read overflow in getaddrinfo in no-aaaa mode
6.5
CVSS
1.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
CL
Codeready Linux Builder Eus · Redhat
9.2 · source: NVD
CL
Codeready Linux Builder Eus For Power Little Endian · Redhat
9.0_ppc64le · source: NVD
CL
Codeready Linux Builder Eus For Power Little Endian Eus · Redhat
9.2_ppc64le · source: NVD
CL
Codeready Linux Builder For Arm64 · Redhat
9.0_aarch64 · source: NVD
CL
Codeready Linux Builder For Arm64 Eus · Redhat
9.2_aarch64 · source: NVD
CL
Codeready Linux Builder For Ibm Z Systems · Redhat
9.0_s390x · source: NVD
CL
Codeready Linux Builder For Ibm Z Systems Eus · Redhat
9.2_s390x · source: NVD
EL
Enterprise Linux · Redhat
8.0; 9.0 · source: NVD
EL
Enterprise Linux Eus · Redhat
8.8; 9.2 · source: NVD
EL
Enterprise Linux For Arm 64 · Redhat
9.0_aarch64 · source: NVD
Affected product
RH
Red Hat Enterprise Linux 8
Red Hat
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-4527
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-4527
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5453
Third Party Advisory
https://access.redhat.com/errata/RHSA-2023:5455
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-4527
Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=2234712
Mailing List
http://www.openwall.com/lists/oss-security/2023/09/25/1
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/
More from Red Hat Enterprise Linux 8
8.8
CVE-2025-31277
Apple Multiple Products Buffer Overflow Vulnerability
7.8
CVE-2026-31431
crypto: algif_aead - Revert to operating out-of-place
7.8
CVE-2023-4911
Glibc: buffer overflow in ld.so leading to privilege escalation
7.5
CVE-2026-34486
Apache Tomcat: Fix for CVE-2026-29146 allowed bypass of EncryptInterceptor
10.0
CVE-2026-42043
Axios: Incomplete Fix for CVE-2025-62718 — NO_PROXY Protection Bypassed via RFC 1122 Loopback Subnet (127.0.0.0/8) in Axios 1.15.0