Vulnerability-Lookup

BDU:2020-05278 (CVE-2020-27675)

Vulnerability from fstec – Published: 2020-11-19 – Updated: 2024-06-18 – View on bdu.fstec.ru Fixed

Title

Уязвимость компонента drivers/xen/events/events_base.c ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость компонента drivers/xen/events/events_base.c ядра операционных систем Linux вызвана одновременным выполнением с использованием общего ресурса с неправильной синхронизацией («Ситуация гонки»). Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании

Severity

4.7 (Medium) CVSS 2.0


                      
                        AV:L/AC:M/Au:N/C:N/I:N/A:C

4.7 (Medium) CVSS 3.0


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

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Timing and state manipulation, Data structure manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-362 - Одновременное выполнение с использованием общего ресурса с неправильной синхронизацией («Ситуация гонки»)
CWE-416 - Использование после освобождения
CWE-476 - Разыменование указателя NULL

Aliases

CVE-2020-27675

References

31 references

URL
http://www.openwall.com/lists/oss-security/2021/01/19/3
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27675
https://cxsecurity.com/cveshow/CVE-2020-27675/
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073d…
https://github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b5dd2
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.207
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.155
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.244
https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.244
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.75
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.5
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapr…
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapr…
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapr…
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproj…
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproj…
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproj…
https://security.gentoo.org/glsa/202011-06
https://ubuntu.com/security/notices/USN-4679-1
https://ubuntu.com/security/notices/USN-4680-1
https://ubuntu.com/security/notices/USN-4681-1
https://ubuntu.com/security/notices/USN-4751-1
https://usn.ubuntu.com/usn/usn-4679-1
https://usn.ubuntu.com/usn/usn-4680-1
https://usn.ubuntu.com/usn/usn-4681-1
https://usn.ubuntu.com/usn/usn-4751-1
https://www.cve.org/CVERecord?id=CVE-2020-27675
https://xenbits.xen.org/xsa/advisory-331.html
https://поддержка.нппкт.рф/bin/view/ОСнова/Обновления/2.4/

Impacted products

4 products from 4 vendors

Vendors

Fedora Project, The Linux Foundation, АО «НППКТ», Сообщество свободного программного обеспечения

Products

Fedora, Xen, ОСОН ОСнова Оnyx (запись в едином реестре российских программ №5913), Linux

Versions

31 (Fedora), 32 (Fedora), 33 (Fedora), до 4.14.0 включительно (Xen), до 2.4 (ОСОН ОСнова Оnyx), от 4.0 до 4.4.243 включительно (Linux), от 4.5 до 4.9.243 включительно (Linux), от 4.10 до 4.14.206 включительно (Linux), от 5.5 до 5.9.4 включительно (Linux), от 4.15 до 4.19.154 включительно (Linux), от 4.20 до 5.4.74 включительно (Linux)

Product types

Operating system, Virtualization software

Platforms

Fedora Project Fedora 31, Fedora Project Fedora 32, Fedora Project Fedora 33, Сообщество свободного программного обеспечения Linux до 5.9.1 включительно

Mitigations

Использование рекомендаций: Для linux: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073d0552ead5bfc7a3a9c01de590e924f11b5dd2 https://github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b5dd2 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.207 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.155 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.244 https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.244 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.75 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.5 Для Fedora: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3ZG6TZLD23QO3PV2AN2HB625ZX47ALTT/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6USZ4APZSBQDHGJLJMHW5JBN4QZV6SKZ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNF2R7FUT4IOJ2RIRGQ7X5R4F4FVVLSR/ Для Xen: https://xenbits.xen.org/xsa/advisory-331.html Для ОСОН Основа: Обновление программного обеспечения linux до версии 5.14.9-2.osnova179.1

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:M/Au:N/C:N/I:N/A:C",
  "CVSS 3.0": "AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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": "Fedora Project, The Linux Foundation, \u0410\u041e \u00ab\u041d\u041f\u041f\u041a\u0422\u00bb, \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",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "31 (Fedora), 32 (Fedora), 33 (Fedora), \u0434\u043e 4.14.0 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Xen), \u0434\u043e 2.4 (\u041e\u0421\u041e\u041d \u041e\u0421\u043d\u043e\u0432\u0430 \u041enyx), \u043e\u0442 4.0 \u0434\u043e 4.4.243 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.5 \u0434\u043e 4.9.243 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.10 \u0434\u043e 4.14.206 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.5 \u0434\u043e 5.9.4 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.15 \u0434\u043e 4.19.154 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 4.20 \u0434\u043e 5.4.74 \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\n\u0414\u043b\u044f linux:\n\nhttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073d0552ead5bfc7a3a9c01de590e924f11b5dd2\nhttps://github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b5dd2\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.207\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.155\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.244\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.244\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.75\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.5\n\n\u0414\u043b\u044f Fedora:\n\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3ZG6TZLD23QO3PV2AN2HB625ZX47ALTT/\t\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6USZ4APZSBQDHGJLJMHW5JBN4QZV6SKZ/\t\n\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNF2R7FUT4IOJ2RIRGQ7X5R4F4FVVLSR/\n\n\n\n\u0414\u043b\u044f Xen:\nhttps://xenbits.xen.org/xsa/advisory-331.html\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 5.14.9-2.osnova179.1",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "20.10.2020",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "18.06.2024",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "19.11.2020",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2020-05278",
  "\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-2020-27675",
  "\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": "Fedora, Xen, \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": "Fedora Project Fedora 31 , Fedora Project Fedora 32 , Fedora Project Fedora 33 , \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 \u0434\u043e 5.9.1 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e ",
  "\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 drivers/xen/events/events_base.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 \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043e\u0431\u0449\u0435\u0433\u043e \u0440\u0435\u0441\u0443\u0440\u0441\u0430 \u0441 \u043d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e\u0439 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0435\u0439 (\u00ab\u0421\u0438\u0442\u0443\u0430\u0446\u0438\u044f \u0433\u043e\u043d\u043a\u0438\u00bb) (CWE-362), \u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u0441\u043b\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f (CWE-416), \u0420\u0430\u0437\u044b\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f NULL (CWE-476)",
  "\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 drivers/xen/events/events_base.c \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Linux \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435\u043c \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043e\u0431\u0449\u0435\u0433\u043e \u0440\u0435\u0441\u0443\u0440\u0441\u0430 \u0441 \u043d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e\u0439 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0435\u0439 (\u00ab\u0421\u0438\u0442\u0443\u0430\u0446\u0438\u044f \u0433\u043e\u043d\u043a\u0438\u00bb). \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 \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\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\u0440\u043e\u043a\u0430\u043c\u0438 \u0438 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c, \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://www.openwall.com/lists/oss-security/2021/01/19/3\nhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27675\nhttps://cxsecurity.com/cveshow/CVE-2020-27675/\nhttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073d0552ead5bfc7a3a9c01de590e924f11b5dd2\nhttps://github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b5dd2\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.207\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.155\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.244\nhttps://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.244\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.75\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.5\nhttps://lists.debian.org/debian-lts-announce/2020/12/msg00015.html\nhttps://lists.debian.org/debian-lts-announce/2020/12/msg00027.html\nhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3ZG6TZLD23QO3PV2AN2HB625ZX47ALTT/\nhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6USZ4APZSBQDHGJLJMHW5JBN4QZV6SKZ/\nhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNF2R7FUT4IOJ2RIRGQ7X5R4F4FVVLSR/\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3ZG6TZLD23QO3PV2AN2HB625ZX47ALTT/\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6USZ4APZSBQDHGJLJMHW5JBN4QZV6SKZ/\nhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNF2R7FUT4IOJ2RIRGQ7X5R4F4FVVLSR/\nhttps://security.gentoo.org/glsa/202011-06\nhttps://ubuntu.com/security/notices/USN-4679-1\nhttps://ubuntu.com/security/notices/USN-4680-1\nhttps://ubuntu.com/security/notices/USN-4681-1\nhttps://ubuntu.com/security/notices/USN-4751-1\nhttps://usn.ubuntu.com/usn/usn-4679-1\nhttps://usn.ubuntu.com/usn/usn-4680-1\nhttps://usn.ubuntu.com/usn/usn-4681-1\nhttps://usn.ubuntu.com/usn/usn-4751-1\nhttps://www.cve.org/CVERecord?id=CVE-2020-27675\nhttps://xenbits.xen.org/xsa/advisory-331.html\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/2.4/",
  "\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-362, CWE-416, CWE-476",
  "\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 4,7)\n\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 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 4,7)"
}

CVE-2020-27675 (GCVE-0-2020-27675)

Vulnerability from cvelistv5 – Published: 2020-10-22 20:32 – Updated: 2024-08-04 16:18

Summary

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

10 references

URL	Tags
https://xenbits.xen.org/xsa/advisory-331.html	x_refsource_MISC
https://github.com/torvalds/linux/commit/073d0552…	x_refsource_MISC
https://git.kernel.org/cgit/linux/kernel/git/torv…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202011-06	vendor-advisoryx_refsource_GENTOO
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/01/19/3	mailing-listx_refsource_MLIST

Show details on NVD website

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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.

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.

Action not permitted

BDU:2020-05278 (CVE-2020-27675)

CVE-2020-27675 (GCVE-0-2020-27675)

Tags

Sightings

Nomenclature

Related by attack behaviour