CVE-2021-43396

Description

In iconvdata/iso-2022-jp-3.c in the GNU C Library (aka glibc) 2.34, remote attackers can force iconv() to emit a spurious '\0' character via crafted ISO-2022-JP-3 data that is accompanied by an internal state reset. This may affect data integrity in certain iconv() use cases. NOTE: the vendor states "the bug cannot be invoked through user input and requires iconv to be invoked with a NULL inbuf, which ought to require a separate application bug to do so unintentionally. Hence there's no security impact to the bug.

CVSS breakdown

Affected products

• gnu / glibc2.34 – 2.34
• oracle / communications_cloud_native_core_binding_support_function22.1.3 – 22.1.3
• oracle / communications_cloud_native_core_network_function_cloud_native_environment22.1.0 – 22.1.0
• oracle / communications_cloud_native_core_network_repository_function22.1.2 – 22.1.2
• oracle / communications_cloud_native_core_network_repository_function22.2.0 – 22.2.0
• oracle / communications_cloud_native_core_security_edge_protection_proxy22.1.1 – 22.1.1
• oracle / communications_cloud_native_core_unified_data_repository22.2.0 – 22.2.0
• oracle / enterprise_operations_monitor4.3 – 4.3
• oracle / enterprise_operations_monitor4.4 – 4.4
• oracle / enterprise_operations_monitor5.0 – 5.0

References

• MISChttps://sourceware.org/bugzilla/show_bug.cgi?id=28524
• MISChttps://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=ff012870b2c02a62598c04daa1e54632e020fd7d
• MISChttps://blog.tuxcare.com/vulnerability/vulnerability-in-iconv-identified-by-tuxcare-team-cve-2021-43396
• VENDOR_ADVISORYhttps://www.oracle.com/security-alerts/cpujul2022.html