Home/CVE/In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_RE
CVE

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_RE

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.

HIGH · CVSS 7.5 EPSS 0.00102
Act now
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

8
gnu glibc<= 2.34
fedoraproject fedoraall versions
oracle communications cloud native core binding support functionall versions
oracle communications cloud native core network function cloud native environmentall versions
oracle communications cloud native core network repository functionall versions
oracle communications cloud native core security edge protection proxyall versions
oracle communications cloud native core unified data repositoryall versions
oracle enterprise operations monitorall versions
⚠

Public Exploits & PoCs

1
pocblog.tuxcare.com · tuxcare-team-identifies-cve-2021-38604-a-new-vulnerabilit...blog.tuxcare.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Aug 2021 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

6
siemens-csafSSA-398330
siemens-csafSSA-831302
msrcCVE-2021-38604
oracle-cpuoracle-cpu-Oracle-Communications-Cloud-Native-Core-Binding-Support-Function-14121--CVE-2021-38604
cisa-csafcisa-csaf-csaf_files-OT-white-2023-icsa-23-166-10
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GYEXYM37RCJWJ6B5KQUYQI4NZBDDYSXP/
https://security.gentoo.org/glsa/202208-24Third Party Advisory
https://security.netapp.com/advisory/ntap-20210909-0005/Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=28213Issue TrackingPatchThird Party Advisory
https://sourceware.org/git/?p=glibc.git
https://sourceware.org/git/?p=glibc.git
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