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.
References (4)
Core 4
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://sourceware.org/bugzilla/show_bug.cgi?id=28524
Patch x_refsource_misc
https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=ff012870b2c02a62598c04daa1e54632e020fd7d
Exploit, Third Party Advisory x_refsource_misc
https://blog.tuxcare.com/vulnerability/vulnerability-in-iconv-identified-by-tuxcare-team-cve-2021-43396
Patch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
Scores
CVSS v3
7.5
EPSS
0.0060
EPSS Percentile
69.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Details
Status
published
Products (10)
gnu/glibc
2.34
oracle/communications_cloud_native_core_binding_support_function
22.1.3
oracle/communications_cloud_native_core_network_function_cloud_native_environment
22.1.0
oracle/communications_cloud_native_core_network_repository_function
22.1.2
oracle/communications_cloud_native_core_network_repository_function
22.2.0
oracle/communications_cloud_native_core_security_edge_protection_proxy
22.1.1
oracle/communications_cloud_native_core_unified_data_repository
22.2.0
oracle/enterprise_operations_monitor
4.3
oracle/enterprise_operations_monitor
4.4
oracle/enterprise_operations_monitor
5.0
Published
Nov 04, 2021
Tracked Since
Feb 18, 2026