CVE-2021-43396 Information

Description

DISPUTED 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 he 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 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://sourceware.org/bugzilla/show_bug.cgi?id=28524 https://sourceware.org/git/?p=glibc.git;a=commit;h=ff012870b2c02a62598c04daa1e54632e020fd7d https://blog.tuxcare.com/vulnerability/vulnerability-in-iconv-identified-by-tuxcare-team-cve-2021-43396

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5