Bug 2020652 (CVE-2021-43396) - CVE-2021-43396 glibc: conversion from ISO-2022-JP-3 with iconv may emit spurious NUL character on state reset
Summary: CVE-2021-43396 glibc: conversion from ISO-2022-JP-3 with iconv may emit spuri...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-43396
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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Depends On: 2020653
Blocks: 2020654 2025838
TreeView+ depends on / blocked
 
Reported: 2021-11-05 14:22 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-03-14 12:14 UTC (History)
24 users (show)

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Last Closed: 2021-11-09 09:04:03 UTC
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Description Guilherme de Almeida Suckevicz 2021-11-05 14:22:10 UTC 
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.

Reference:
https://sourceware.org/bugzilla/show_bug.cgi?id=28524
Comment 1 Guilherme de Almeida Suckevicz 2021-11-05 14:22:29 UTC 
Created glibc tracking bugs for this issue:

Affects: fedora-all [bug 2020653]
Comment 4 Riccardo Schirone 2021-11-09 09:06:51 UTC 
See https://sourceware.org/bugzilla/show_bug.cgi?id=28524#c4 for more details on why this is not considered a security issue.
I have requested to MITRE to reject this CVE.
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