A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Glibc | Gnu | * | 2.36 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | glibc-0:2.28-225.el8_8.6 | * |
| Red Hat Enterprise Linux 8 | RedHat | glibc-0:2.28-225.el8_8.6 | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support | RedHat | glibc-0:2.28-189.8.el8_6 | * |
| Red Hat Enterprise Linux 9 | RedHat | glibc-0:2.34-100.el9 | * |
| Red Hat Enterprise Linux 9 | RedHat | glibc-0:2.34-60.el9_2.7 | * |
| Red Hat Enterprise Linux 9 | RedHat | glibc-0:2.34-100.el9 | * |
| Red Hat Enterprise Linux 9 | RedHat | glibc-0:2.34-60.el9_2.7 | * |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | RedHat | glibc-0:2.28-189.8.el8_6 | * |
| Eglibc | Ubuntu | trusty | * |
| Eglibc | Ubuntu | trusty/esm | * |
| Glibc | Ubuntu | bionic | * |
| Glibc | Ubuntu | esm-infra/bionic | * |
| Glibc | Ubuntu | esm-infra/focal | * |
| Glibc | Ubuntu | esm-infra/xenial | * |
| Glibc | Ubuntu | focal | * |
| Glibc | Ubuntu | jammy | * |
| Glibc | Ubuntu | trusty | * |
| Glibc | Ubuntu | upstream | * |
| Glibc | Ubuntu | xenial | * |
Potential Mitigations
References
- https://access.redhat.com/errata/RHBA-2024:2413
- https://access.redhat.com/errata/RHSA-2023:5453
- https://access.redhat.com/errata/RHSA-2023:5455
- https://access.redhat.com/errata/RHSA-2023:7409
- https://access.redhat.com/security/cve/CVE-2023-4813
- https://bugzilla.redhat.com/show_bug.cgi?id=2237798
- http://www.openwall.com/lists/oss-security/2023/10/03/8
- https://access.redhat.com/errata/RHSA-2023:5453
- https://access.redhat.com/errata/RHSA-2023:5455
- https://access.redhat.com/errata/RHSA-2023:7409
- https://access.redhat.com/security/cve/CVE-2023-4813
- https://bugzilla.redhat.com/show_bug.cgi?id=2237798
- https://security.netapp.com/advisory/ntap-20231110-0003/