High severity · published Aug 12, 2021
CVE-2021-38604
In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference
7.5
CVSS
3.7%
EPSS
No
On KEV
Description
In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.7% · higher than 90% 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
FE
Fedora · Fedoraproject
35 · source: NVD
GL
Glibc · Gnu
through 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-2021-38604
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-38604
Exploit
https://blog.tuxcare.com/cve/tuxcare-team-identifies-cve-2021-38604-a-new-vulnerability-in-glibc
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GYEXYM37RCJWJ6B5KQUYQI4NZBDDYSXP/
Third Party Advisory
https://security.gentoo.org/glsa/202208-24
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210909-0005/
Issue Tracking
https://sourceware.org/bugzilla/show_bug.cgi?id=28213
sourceware.org
https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=4cc79c217744743077bf7a0ec5e0a4318f1e6641
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