Race condition in xen (Alpine package)

1) Race condition

EUVDB-ID: #VU49941

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27672

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Systems Director: 6.3.2.2

xen (Alpine package): 3.2.0-24.38 - 3.2.0-27.43

xen (Alpine package): 1.24 - 1.28

xen (Alpine package): 1.42

xen (Alpine package): 1.2.0-0ubuntu1 - 1.2.3-0ubuntu2.7

xen (Alpine package): 3.0.8-1 - 3.0.13-1

xen (Alpine package): 2:1.3.2-2ubuntu0.1

xen (Alpine package): 1:6.2.3-5

xen (Alpine package): 0.11-4

xen (Alpine package): 3.2.21-1

xen (Alpine package): 1.88-1

xen (Alpine package): 0.2.3.2-1

xen (Alpine package): 0.101 - 0.102ubuntu1

xen (Alpine package): 0.1.0-0ubuntu1 - 0.1.5-0ubuntu1

xen (Alpine package): 3.1-1 - 3.1-2

xen (Alpine package): 1.3.1-1 - 1.3.1-2

xen (Alpine package): 3.1-1

xen (Alpine package): 0.18.1.1-9ubuntu1

xen (Alpine package): 4.63-15

xen (Alpine package): 3.1.6.1-1

xen (Alpine package): 2.55-2 - 2.72-1

xen (Alpine package): 2.2.0.3-2ubuntu5

xen (Alpine package): 3.5.11.2003.06.04-3

xen (Alpine package): 5.4-2ubuntu1

xen (Alpine package): 5.4b-1

xen (Alpine package): 0.15

xen (Alpine package): 0.18ubuntu0.2 - 0.32

xen (Alpine package): 0.3.6.0amd12 - 1.12.9

xen (Alpine package): 1.9.9-3 - 1.9.10-1

xen (Alpine package): 0.48-4

xen (Alpine package): 0.9b-20040421-1 - 1.1-20120215-2

xen (Alpine package): 0.16 - 0.35

xen (Alpine package): 0.2 - 0.9

xen (Alpine package): 0.4

xen (Alpine package): 2.5.3 - 2.17.5ubuntu1

xen (Alpine package): 3.4.0-1

xen (Alpine package): 0.14-1 - 0.15-2

xen (Alpine package): 2014.1-3

xen (Alpine package): 24.0-0ubuntu1

xen (Alpine package): 0.5.2-0ubuntu1 - 1.2.5ubuntu1daily13.06.14-0ubuntu1

xen (Alpine package): 3.0-0ubuntu1

xen (Alpine package): 1.5.2 - 1.6.2

xen (Alpine package): 0.1.8 - 1.0.75

xen (Alpine package): 1.20.0 - 2.18.2

xen (Alpine package): 20081029ubuntu63 - 20101020ubuntu468

xen (Alpine package): 0.74 - 9.20160115

xen (Alpine package): 0.2.12 - 1.5.49

xen (Alpine package): 1.8.8-2ubuntu1

xen (Alpine package): 0.2.8-8 - 0.2.11-1

xen (Alpine package): 0.3 - 1.8.42

xen (Alpine package): 5.3.28-3 - 5.3.28-4

xen (Alpine package): 1.5

xen (Alpine package): 0.4.5 - 0.5.8-2.2

xen (Alpine package): 0.2.11-1build1

xen (Alpine package): 0.63

xen (Alpine package): 0.3.1-0ubuntu1 - 0.10.0-3

xen (Alpine package): 0.13-1 - 0.22.1-2

xen (Alpine package): 2.1.0-2 - 2.1.26.dfsg1-14

xen (Alpine package): 0.5.16-3.5ubuntu1 - 0.5.17-6

xen (Alpine package): 1.3-1 - 1.3-3

xen (Alpine package): 5.11-1 - 7.35.0-1

xen (Alpine package): 1.3.9-17 - 2.0.3-2

xen (Alpine package): 0.1.2-1 - 0.2.6-1ubuntu1

xen (Alpine package): 1.0.47-2 - 1.0.64-0ubuntu1

xen (Alpine package): 2.1-3-dfsg-1 - 2.1-3-dfsg-2

xen (Alpine package): 0.100-3

xen (Alpine package): 2:1.0.6-2ubuntu7 - 2:1.6.4-1

xen (Alpine package): 0.8 - 9ubuntu2

xen (Alpine package): 3.0pl1-50 - 3.0pl1-119

xen (Alpine package): 1.0.0-0ubuntu1 - 1.0.0-0ubuntu2

xen (Alpine package): expression - 7.1.1-1

xen (Alpine package): 2.8.13-7 - 2.8.13-10

xen (Alpine package): 2.4.2-16 - 2.7-1

xen (Alpine package): 0.92-0ubuntu3 - 0.98-1

xen (Alpine package): 4.5.7-1 - 8.20-3ubuntu4

xen (Alpine package): 0.2.10-3 - 0.4.6-3

xen (Alpine package): 1.5 - 1.141

xen (Alpine package): 1:0.8.6-0ubuntu4 - 1:0.9.7.6-0ubuntu2

xen (Alpine package): 0.3ubuntu7 - 0.3ubuntu15.2

xen (Alpine package): 1.2.12-1ubuntu1 - 1.2.12-1

xen (Alpine package): 0.7-svn20050721 - 1.4.29-1

xen (Alpine package): 2.8.12.1-1.6 - 3.9.0-1

xen (Alpine package): 1.0.5-2 - 1.0.8-3

xen (Alpine package): 0.25-0ubuntu1 - 0.25-0ubuntu3

xen (Alpine package): 0.9-0ubuntu1 - 0.12-0ubuntu1

xen (Alpine package): 1.4.4

xen (Alpine package): 2.2.15-1

xen (Alpine package): 1.4.2

xen (Alpine package): 4.8.9

xen (Alpine package): 3.0.4

xen (Alpine package): 2.1.0

xen (Alpine package): 1.4.17

xen (Alpine package): 2.2.0b2

xen (Alpine package): r12.0 nil

xen (Alpine package): 3.0

xen (Alpine package):

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_systems_director:6.3.2.2:*:*:*:*:*:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.2.0-24.38:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.2.0-27.43:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.24:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.28:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.42:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.2.0-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.2.1-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.2.3-0ubuntu2.7:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.0.8-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2:1.3.2-2ubuntu0.1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1:6.2.3-5:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.11-4:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.2.21-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.88-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.2.3.2-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.101:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.1.0-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.1-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.3.1-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.1-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.18.1.1-9ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:4.63-15:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.1.6.1-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.55-2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.2.0.3-2ubuntu5:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.5.11.2003.06.04-3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:5.4-2ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:5.4b-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.15:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.18ubuntu0.2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.3.6.0amd12:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.9.9-3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.48-4:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.9b-20040421-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.16:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.4:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.5.3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.4.0-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.14-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2014.1-3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:24.0-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.5.2-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.0-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.5.2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.1.8:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.20.0:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:20081029ubuntu63:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.74:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.2.12:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.8.8-2ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.2.8-8:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:5.3.28-3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.5:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.4.5:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.2.11-1build1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.63:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.3.1-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.13-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.1.0-2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.5.16-3.5ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.3-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:5.11-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.3.9-17:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.1.2-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.0.47-2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.1-3-dfsg-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.100-3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2:1.0.6-2ubuntu7:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.8:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.0pl1-50:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.0.0-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:expression:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.8.13-7:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.4.2-16:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.92-0ubuntu3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:4.5.7-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.2.10-3:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.5:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1:0.8.6-0ubuntu4:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.3ubuntu7:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.2.12-1ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.7-svn20050721:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.8.12.1-1.6:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.0.5-2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.25-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:0.9-0ubuntu1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.4.4:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.2.15-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.4.2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:4.8.9:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.0.4:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.1.0:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.4.17:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:2.2.0b2:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.0:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=b7415ec9fb42dde32333fbc1e4575f6bcf11cb32
https://git.alpinelinux.org/aports/commit/?id=7c351cb852f0cee887b3fcb3a76be20f51350a1a
https://git.alpinelinux.org/aports/commit/?id=b47f6b6f2e6b179714227cc362a24b0bdb78a028
https://git.alpinelinux.org/aports/commit/?id=7335a7d4162b6694682183dfea682f282843d5f3
https://git.alpinelinux.org/aports/commit/?id=91c8694f2fdbc9ff757dc2f658107b9a87428d10

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.