Vulnerability-Lookup

BDU:2021-03848 (CVE-2021-33909)

Vulnerability from fstec – Published: 2021-07-30 – Updated: 2024-09-13 – View on bdu.fstec.ru Exploit publicly available Fixed

Title

Уязвимость компонента fs/seq_file.c ядра операционных систем Linux, позволяющая нарушителю повысить свои привилегии

Summary

Уязвимость компонента fs/seq_file.c ядра операционных систем Linux связана с записью за границы буфера памяти. Эксплуатация уязвимости может позволить нарушителю повысить свои привилегии

Severity

6.8 (Medium) CVSS 2.0


                      
                        AV:L/AC:L/Au:S/C:C/I:C/A:C

7.8 (High) CVSS 3.0


                      
                        CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Data structure manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-190 - Целочисленное переполнение или циклический сдвиг
CWE-787 - Запись за границами буфера

Aliases

CVE-2021-33909

References

46 references

URL
http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Files…
http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-L…
http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-L…
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-L…
http://www.openwall.com/lists/oss-security/2021/07/22/7
http://www.openwall.com/lists/oss-security/2021/08/25/10
http://www.openwall.com/lists/oss-security/2021/09/17/2
http://www.openwall.com/lists/oss-security/2021/09/17/4
http://www.openwall.com/lists/oss-security/2021/09/21/1
https://access.redhat.com/security/cve/cve-2021-33909
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33909
https://cve.omprussia.ru/bb10321
https://cve.omprussia.ru/bb11322
https://cve.omprussia.ru/bb12323
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8…
https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.276
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134
https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html
https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapr…
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproj…
https://nvd.nist.gov/vuln/detail/CVE-2021-33909
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015
https://security.netapp.com/advisory/ntap-20210819-0004/
https://ubuntu.com/security/notices/USN-5014-1
https://ubuntu.com/security/notices/USN-5015-1
https://ubuntu.com/security/notices/USN-5016-1
https://ubuntu.com/security/notices/USN-5017-1
https://ubuntu.com/security/notices/USN-5018-1
https://wiki.astralinux.ru/astra-linux-se16-bulletin-20210730SE16
https://www.cve.org/CVERecord?id=CVE-2021-33909
https://www.debian.org/security/2021/dsa-4941
https://www.openwall.com/lists/oss-security/2021/07/20/1
https://www.openwall.com/lists/oss-security/2021/08/25/10
https://www.oracle.com/security-alerts/cpujan2022.html
https://www.qualys.com/2021/07/20/cve-2021-33909/sequoia-local-privilege-escala…
https://поддержка.нппкт.рф/bin/view/ОСнова/Обновления/2.1/

Impacted products

8 products from 7 vendors

Vendors

Red Hat, Inc., Сообщество свободного программного обеспечения, ООО «РусБИТех-Астра», Fedora Project, ООО "Открытая мобильная платформа", АО «НППКТ»

Products

Red Hat Enterprise Linux, Debian GNU/Linux, Astra Linux Special Edition (запись в едином реестре российских программ №369), Fedora, Red Hat Virtualization, ОС Аврора (запись в едином реестре российских программ №1543), ОСОН ОСнова Оnyx (запись в едином реестре российских программ №5913), Linux

Versions

7 (Red Hat Enterprise Linux), 9 (Debian GNU/Linux), 1.6 «Смоленск» (Astra Linux Special Edition), 8 (Red Hat Enterprise Linux), 10 (Debian GNU/Linux), 7.2 Advanced Update Support (Red Hat Enterprise Linux), 7.4 US for SAP Solutions (Red Hat Enterprise Linux), 7.3 Advanced Update Support (Red Hat Enterprise Linux), 7.4 Telco Extended Update Support (Red Hat Enterprise Linux), 7.4 Advanced Update Support (Red Hat Enterprise Linux), 8.1 Extended Update Support (Red Hat Enterprise Linux), 7.7 Extended Update Support (Red Hat Enterprise Linux), 8.2 Extended Update Support (Red Hat Enterprise Linux), 6 Extended Lifecycle Support (Red Hat Enterprise Linux), 34 (Fedora), 4 for RHEL 8 (Red Hat Virtualization), 7.6 Telco Extended Update Support (Red Hat Enterprise Linux), 7.6 Advanced Update Support (Red Hat Enterprise Linux), 7.6 Update Services for SAP Solutions (Red Hat Enterprise Linux), до 4.0.2 (ОС Аврора), до 2.1 (ОСОН ОСнова Оnyx), от 4.0 до 4.4.275 включительно (Linux), от 4.5 до 4.9.275 включительно (Linux), от 4.10 до 4.14.239 включительно (Linux), от 4.15 до 4.19.197 включительно (Linux), от 4.20 до 5.4.133 включительно (Linux), от 5.5 до 5.10.51 включительно (Linux), от 5.11 до 5.12.18 включительно (Linux), от 5.13.0 до 5.13.3 включительно (Linux)

Product types

Operating system, Virtualization software

Platforms

Red Hat, Inc. Red Hat Enterprise Linux 7, Сообщество свободного программного обеспечения Debian GNU/Linux 9, ООО «РусБИТех-Астра» Astra Linux Special Edition 1.6 «Смоленск» (запись в едином реестре российских программ №369), Inc. Red Hat Enterprise Linux 8, Сообщество свободного программного обеспечения Debian GNU/Linux 10, Inc. Red Hat Enterprise Linux 7.2 Advanced Update Support, Inc. Red Hat Enterprise Linux 7.4 US for SAP Solutions, Inc. Red Hat Enterprise Linux 7.3 Advanced Update Support, Inc. Red Hat Enterprise Linux 7.4 Telco Extended Update Support, Inc. Red Hat Enterprise Linux 7.4 Advanced Update Support, Inc. Red Hat Enterprise Linux 8.1 Extended Update Support, Inc. Red Hat Enterprise Linux 7.7 Extended Update Support, Inc. Red Hat Enterprise Linux 8.2 Extended Update Support, Inc. Red Hat Enterprise Linux 6 Extended Lifecycle Support, Fedora Project Fedora 34, Сообщество свободного программного обеспечения Linux от 3.16 до 5.13.4, Inc. Red Hat Enterprise Linux 7.6 Telco Extended Update Support, Inc. Red Hat Enterprise Linux 7.6 Advanced Update Support, Inc. Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions

Mitigations

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:S/C:C/I:C/A:C",
  "CVSS 3.0": "AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Red Hat, Inc., \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f, \u041e\u041e\u041e \u00ab\u0420\u0443\u0441\u0411\u0418\u0422\u0435\u0445-\u0410\u0441\u0442\u0440\u0430\u00bb, Fedora Project, \u041e\u041e\u041e \"\u041e\u0442\u043a\u0440\u044b\u0442\u0430\u044f \u043c\u043e\u0431\u0438\u043b\u044c\u043d\u0430\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\", \u0410\u041e \u00ab\u041d\u041f\u041f\u041a\u0422\u00bb",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "7 (Red Hat Enterprise Linux), 9 (Debian GNU/Linux), 1.6 \u00ab\u0421\u043c\u043e\u043b\u0435\u043d\u0441\u043a\u00bb (Astra Linux Special Edition), 8 (Red Hat Enterprise Linux), 10 (Debian GNU/Linux), 7.2 Advanced Update Support (Red Hat Enterprise Linux), 7.4 US for SAP Solutions (Red Hat Enterprise Linux), 7.3 Advanced Update Support (Red Hat Enterprise Linux), 7.4 Telco Extended Update Support (Red Hat Enterprise Linux), 7.4 Advanced Update Support (Red Hat Enterprise Linux), 8.1 Extended Update Support (Red Hat Enterprise Linux), 7.7 Extended Update Support (Red Hat Enterprise Linux), 8.2 Extended Update Support (Red Hat Enterprise Linux), 6 Extended Lifecycle Support (Red Hat Enterprise Linux), 34 (Fedora), 4 for RHEL 8 (Red Hat Virtualization), 7.6 Telco Extended Update Support (Red Hat Enterprise Linux), 7.6 Advanced Update Support (Red Hat Enterprise Linux), 7.6 Update Services for SAP Solutions (Red Hat Enterprise Linux), \u0434\u043e 4.0.2 (\u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430), \u0434\u043e 2.1 (\u041e\u0421\u041e\u041d \u041e\u0421\u043d\u043e\u0432\u0430 \u041enyx), \u043e\u0442 4.0 \u0434\u043e 4.4.275 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.5 \u0434\u043e 4.9.275 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.10 \u0434\u043e 4.14.239 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.15 \u0434\u043e 4.19.197 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.20 \u0434\u043e 5.4.133 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.5 \u0434\u043e 5.10.51 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.11 \u0434\u043e 5.12.18 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.13.0 \u0434\u043e 5.13.3 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\n\u0414\u043b\u044f Linux:\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b\nhttps://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.276\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134\n\n\u0414\u043b\u044f Fedora:\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4\n\n\u0414\u043b\u044f Debian:\nhttps://lists.debian.org/debian-lts-announce/2021/07/msg00014.html\t\nhttps://lists.debian.org/debian-lts-announce/2021/07/msg00015.html\t\nhttps://lists.debian.org/debian-lts-announce/2021/07/msg00016.html\nhttps://www.debian.org/security/2021/dsa-4941\t\n\n\u0414\u043b\u044f \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u043e\u0432 Red Hat Inc.:\nhttps://access.redhat.com/security/cve/cve-2021-33909\n\n\u0414\u043b\u044f Astra Linux:\n\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f: https://wiki.astralinux.ru/astra-linux-se16-bulletin-20210730SE16\n\n\u0414\u043b\u044f \u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430 3.2.1: \nhttps://cve.omprussia.ru/bb10321 \n\n\u0414\u043b\u044f \u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430 3.2.2: \nhttps://cve.omprussia.ru/bb11322\n\n\u0414\u043b\u044f \u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430 3.2.3:\nhttps://cve.omprussia.ru/bb12323\n\n\u0414\u043b\u044f \u041e\u0421\u041e\u041d \u041e\u0441\u043d\u043e\u0432\u0430:\n\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f linux \u0434\u043e \u0432\u0435\u0440\u0441\u0438\u0438 5.4.123-1~bpo10+1.osnova164",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "19.07.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "13.09.2024",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "30.07.2021",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2021-03848",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2021-33909",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Red Hat Enterprise Linux, Debian GNU/Linux, Astra Linux Special Edition (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u2116369), Fedora, Red Hat Virtualization, \u041e\u0421 \u0410\u0432\u0440\u043e\u0440\u0430 (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u21161543), \u041e\u0421\u041e\u041d \u041e\u0421\u043d\u043e\u0432\u0430 \u041enyx (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u21165913), Linux",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Red Hat, Inc. Red Hat Enterprise Linux 7 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Debian GNU/Linux 9 , \u041e\u041e\u041e \u00ab\u0420\u0443\u0441\u0411\u0418\u0422\u0435\u0445-\u0410\u0441\u0442\u0440\u0430\u00bb Astra Linux Special Edition 1.6 \u00ab\u0421\u043c\u043e\u043b\u0435\u043d\u0441\u043a\u00bb  (\u0437\u0430\u043f\u0438\u0441\u044c \u0432 \u0435\u0434\u0438\u043d\u043e\u043c \u0440\u0435\u0435\u0441\u0442\u0440\u0435 \u0440\u043e\u0441\u0441\u0438\u0439\u0441\u043a\u0438\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c \u2116369), Red Hat, Inc. Red Hat Enterprise Linux 8 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Debian GNU/Linux 10 , Red Hat, Inc. Red Hat Enterprise Linux 7.2 Advanced Update Support , Red Hat, Inc. Red Hat Enterprise Linux 7.4 US for SAP Solutions , Red Hat, Inc. Red Hat Enterprise Linux 7.3 Advanced Update Support , Red Hat, Inc. Red Hat Enterprise Linux 7.4 Telco Extended Update Support , Red Hat, Inc. Red Hat Enterprise Linux 7.4 Advanced Update Support , Red Hat, Inc. Red Hat Enterprise Linux 8.1 Extended Update Support , Red Hat, Inc. Red Hat Enterprise Linux 7.7 Extended Update Support , Red Hat, Inc. Red Hat Enterprise Linux 8.2 Extended Update Support , Red Hat, Inc. Red Hat Enterprise Linux 6 Extended Lifecycle Support , Fedora Project Fedora 34 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 3.16 \u0434\u043e 5.13.4 , Red Hat, Inc. Red Hat Enterprise Linux 7.6 Telco Extended Update Support , Red Hat, Inc. Red Hat Enterprise Linux 7.6 Advanced Update Support , Red Hat, Inc. Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 fs/seq_file.c \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u0426\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u0435 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0438\u043b\u0438 \u0446\u0438\u043a\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0441\u0434\u0432\u0438\u0433 (CWE-190), \u0417\u0430\u043f\u0438\u0441\u044c \u0437\u0430 \u0433\u0440\u0430\u043d\u0438\u0446\u0430\u043c\u0438 \u0431\u0443\u0444\u0435\u0440\u0430 (CWE-787)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 fs/seq_file.c \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Linux \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u0437\u0430\u043f\u0438\u0441\u044c\u044e \u0437\u0430 \u0433\u0440\u0430\u043d\u0438\u0446\u044b \u0431\u0443\u0444\u0435\u0440\u0430 \u043f\u0430\u043c\u044f\u0442\u0438. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html\nhttp://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html\nhttp://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html\nhttp://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html\nhttp://www.openwall.com/lists/oss-security/2021/07/22/7\nhttp://www.openwall.com/lists/oss-security/2021/08/25/10\nhttp://www.openwall.com/lists/oss-security/2021/09/17/2\nhttp://www.openwall.com/lists/oss-security/2021/09/17/4\nhttp://www.openwall.com/lists/oss-security/2021/09/21/1\nhttps://access.redhat.com/security/cve/cve-2021-33909\nhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4\nhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33909\nhttps://cve.omprussia.ru/bb10321\nhttps://cve.omprussia.ru/bb11322\nhttps://cve.omprussia.ru/bb12323\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b\nhttps://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.240\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.198\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.276\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.276\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134\nhttps://lists.debian.org/debian-lts-announce/2021/07/msg00014.html\nhttps://lists.debian.org/debian-lts-announce/2021/07/msg00015.html\nhttps://lists.debian.org/debian-lts-announce/2021/07/msg00016.html\nhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-33909\nhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015\nhttps://security.netapp.com/advisory/ntap-20210819-0004/\nhttps://ubuntu.com/security/notices/USN-5014-1\nhttps://ubuntu.com/security/notices/USN-5015-1\nhttps://ubuntu.com/security/notices/USN-5016-1\nhttps://ubuntu.com/security/notices/USN-5017-1\nhttps://ubuntu.com/security/notices/USN-5018-1\nhttps://wiki.astralinux.ru/astra-linux-se16-bulletin-20210730SE16\nhttps://www.cve.org/CVERecord?id=CVE-2021-33909\nhttps://www.debian.org/security/2021/dsa-4941\nhttps://www.openwall.com/lists/oss-security/2021/07/20/1\nhttps://www.openwall.com/lists/oss-security/2021/08/25/10\nhttps://www.oracle.com/security-alerts/cpujan2022.html\nhttps://www.qualys.com/2021/07/20/cve-2021-33909/sequoia-local-privilege-escalation-linux.txt\nhttps://\u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430.\u043d\u043f\u043f\u043a\u0442.\u0440\u0444/bin/view/\u041e\u0421\u043d\u043e\u0432\u0430/\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f/2.1/",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430, \u041f\u041e \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438/\u041f\u041e \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e-\u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-190, CWE-787",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 6,8)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 7,8)"
}

CVE-2021-33909 (GCVE-0-2021-33909)

Vulnerability from cvelistv5 – Published: 2021-07-20 18:01 – Updated: 2024-08-04 00:05

Summary

fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

20 references

URL	Tags
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://www.debian.org/security/2021/dsa-4941	vendor-advisoryx_refsource_DEBIAN
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
http://www.openwall.com/lists/oss-security/2021/07/22/7	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/0…	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/2	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/4	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/21/1	mailing-listx_refsource_MLIST
https://www.oracle.com/security-alerts/cpujan2022.html	x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/…	x_refsource_MISC
https://github.com/torvalds/linux/commit/8cae8cd8…	x_refsource_CONFIRM
https://cdn.kernel.org/pub/linux/kernel/v5.x/Chan…	x_refsource_CONFIRM
http://packetstormsecurity.com/files/163621/Sequo…	x_refsource_MISC
http://packetstormsecurity.com/files/163671/Kerne…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021081…	x_refsource_CONFIRM
http://packetstormsecurity.com/files/164155/Kerne…	x_refsource_MISC
http://packetstormsecurity.com/files/165477/Kerne…	x_refsource_MISC
https://psirt.global.sonicwall.com/vuln-detail/SN…	x_refsource_CONFIRM

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:05:52.143Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-2] linux security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html"
          },
          {
            "name": "[debian-lts-announce] 20210720 [SECURITY] [DLA 2713-1] linux security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.