CVE-2023-4527
MEDIUM severity · CVSS 6.5 · CWE-121
6.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactLow
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)2%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://access.redhat.com/errata/RHSA-2023:5453Advisory
- https://access.redhat.com/errata/RHSA-2023:5455Advisory
- https://access.redhat.com/security/cve/CVE-2023-4527Advisory
- http://www.openwall.com/lists/oss-security/2023/09/25/1Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2234712Advisory