The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an application.
This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from systems that do not need them.
Weakness
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Glibc | Gnu | * | 2.43 (including) |
| Red Hat Enterprise Linux 10 | RedHat | glibc-0:2.39-124.el10_2 | * |
| Red Hat Enterprise Linux 8 | RedHat | glibc-0:2.28-251.el8_10.37 | * |
| Red Hat Enterprise Linux 8 | RedHat | glibc-0:2.28-251.el8_10.37 | * |
| Red Hat Enterprise Linux 9 | RedHat | glibc-0:2.34-270.el9_8 | * |
| Red Hat Enterprise Linux 9 | RedHat | glibc-0:2.34-270.el9_8 | * |
| Red Hat Hardened Images | RedHat | glibc-main-2.42-12.hum1 | * |
| Red Hat Insights proxy 1.5 | RedHat | insights-proxy/insights-proxy-container-rhel9:1780420428 | * |
| Red Hat Update Infrastructure 5 | RedHat | rhui5/cds-rhel9:1781525684 | * |
| Red Hat Update Infrastructure 5 | RedHat | rhui5/haproxy-rhel9:1781525671 | * |
| Red Hat Update Infrastructure 5 | RedHat | rhui5/installer-rhel9:1781525693 | * |
| Red Hat Update Infrastructure 5 | RedHat | rhui5/rhua-rhel9:1781525739 | * |
| Glibc | Ubuntu | devel | * |
| Glibc | Ubuntu | esm-infra-legacy/xenial | * |
| Glibc | Ubuntu | esm-infra/bionic | * |
| Glibc | Ubuntu | esm-infra/focal | * |
| Glibc | Ubuntu | esm-infra/xenial | * |
| Glibc | Ubuntu | jammy | * |
| Glibc | Ubuntu | noble | * |
| Glibc | Ubuntu | questing | * |
| Glibc | Ubuntu | resolute | * |
Extended Description
While assertion is good for catching logic errors and reducing the chances of reaching more serious vulnerability conditions, it can still lead to a denial of service. For example, if a server handles multiple simultaneous connections, and an assert() occurs in one single connection that causes all other connections to be dropped, this is a reachable assertion that leads to a denial of service.