Vulnerability Name:

CVE-2021-3308 (CCN-195359)

Assigned:2021-01-21
Published:2021-01-21
Updated:2022-04-26
Summary:An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.1 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
6.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-3308

Source: MLIST
Type: Mailing List, Patch, Third Party Advisory
[oss-security] 20210126 Xen Security Advisory 360 v2 (CVE-2021-3308) - IRQ vector leak on x86

Source: CCN
Type: Xen Security Advisory XSA-360
IRQ vector leak on x86

Source: MISC
Type: Patch, Vendor Advisory
http://xenbits.xen.org/xsa/advisory-360.html

Source: XF
Type: UNKNOWN
xen-irq-dos(195359)

Source: FEDORA
Type: Third Party Advisory
FEDORA-2021-16c9c40d4d

Source: GENTOO
Type: Third Party Advisory
GLSA-202107-30

Vulnerable Configuration:Configuration 1:
  • cpe:/o:xen:xen:4.12.3:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:4.12.4:*:*:*:*:*:*:*
  • OR cpe:/o:xen:xen:*:*:*:*:*:*:*:* (Version >= 4.13.1 and <= 4.14.1)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:xensource:xen:4.12.3:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.12.4:*:*:*:*:*:*:*
  • OR cpe:/a:xensource:xen:4.13.1:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:7947
    P
    		libmodplug-devel-0.3.28-2.13.1 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:51952
    P
    		Security update for libX11 (Moderate)
    2022-11-15
    oval:org.opensuse.security:def:3369
    P
    		squid-4.8-2.17 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:95181
    P
    		bogofilter-common-1.2.4-1.40 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94481
    P
    		 (Important)
    2022-03-07
    oval:org.opensuse.security:def:101894
    P
    		Security update for the Linux Kernel (Critical)
    2022-02-11
    oval:org.opensuse.security:def:99445
    P
    		 (Important)
    2021-12-22
    oval:org.opensuse.security:def:96788
    P
    		tpm2.0-tools-3.1.2-5.30 on GA media (Moderate)
    2021-09-21
    oval:org.opensuse.security:def:88501
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:127162
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:59534
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:33711
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:89189
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:59792
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:33969
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:125597
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:89447
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:23964
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:88185
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:126765
    P
    		Security update for xen (Important)
    2021-09-03
    oval:org.opensuse.security:def:101194
    P
    		libical-devel-3.0.6-4.3.1 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:99644
    P
    		 (Moderate)
    2021-06-09
    oval:org.opensuse.security:def:99951
    P
    		 (Important)
    2021-06-02
    oval:org.opensuse.security:def:8745
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:98856
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:92101
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:10246
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:92893
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:69835
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:8940
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:99051
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:96917
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:92296
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:93046
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:70386
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:9496
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:99246
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:92495
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:93199
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:91906
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:9695
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:92694
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:69636
    P
    		Security update for xen (Important)
    2021-04-30
    oval:org.opensuse.security:def:111303
    P
    		Security update for xen (Important)
    2021-04-07
    oval:org.opensuse.security:def:26024
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:64458
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:117375
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:108560
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:102718
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:66722
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:118480
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:73580
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:5633
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:109384
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:42058
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:96028
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:69036
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:75790
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:60220
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:5011
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:34397
    P
    		Security update for xen (Important)
    2021-04-06
    oval:org.opensuse.security:def:107860
    P
    		Security update for xen (Important)
    2021-04-06
    BACK
    xen xen 4.12.3
    xen xen 4.12.4
    xen xen *
    fedoraproject fedora 32
    xensource xen 4.12.3
    xensource xen 4.12.4
    xensource xen 4.13.1