High severity · published Nov 4, 2021
CVE-2021-43396
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…
7.5
CVSS
3.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.3% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Communications Cloud Native Core Binding Support Function · Oracle
22.1.3 · source: NVD
CC
CC
Communications Cloud Native Core Network Repository Function · Oracle
22.1.2; 22.2.0 · source: NVD
CC
Communications Cloud Native Core Security Edge Protection Proxy · Oracle
22.1.1 · source: NVD
CC
Communications Cloud Native Core Unified Data Repository · Oracle
22.2.0 · source: NVD
EO
Enterprise Operations Monitor · Oracle
4.3; 4.4; 5.0 · source: NVD
GL
Glibc · Gnu
2.34 · source: NVD
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5; V3.1.0 before V3.1.5 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5; V3.1.0 before V3.1.5 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43396
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43396
Exploit
https://blog.tuxcare.com/vulnerability/vulnerability-in-iconv-identified-by-tuxcare-team-cve-2021-43396
Exploit
https://sourceware.org/bugzilla/show_bug.cgi?id=28524
sourceware.org
https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=ff012870b2c02a62598c04daa1e54632e020fd7d
Patch
https://www.oracle.com/security-alerts/cpujul2022.html
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
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