Untrusted search path in xen (Alpine package)

1) Untrusted search path

EUVDB-ID: #VU49132

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:U/U:Clear]

CVE-ID: CVE-2020-29482

CWE-ID: CWE-426 - Untrusted Search Path

Exploit availability: No

Description

The vulnerability allows a local privileged user to a crash the entire system.

An issue was discovered in Xen through 4.14.x. A guest may access xenstore paths via absolute paths containing a full pathname, or via a relative path, which implicitly includes /local/domain/$DOMID for their own domain id. Management tools must access paths in guests' namespaces, necessarily using absolute paths. oxenstored imposes a pathname limit that is applied solely to the relative or absolute path specified by the client. Therefore, a guest can create paths in its own namespace which are too long for management tools to access. Depending on the toolstack in use, a malicious guest administrator might cause some management tools and debugging operations to fail. For example, a guest administrator can cause "xenstore-ls -r" to fail. However, a guest administrator cannot prevent the host administrator from tearing down the domain. All systems using oxenstored are vulnerable. Building and using oxenstored is the default in the upstream Xen distribution, if the Ocaml compiler is available. Systems using C xenstored are not vulnerable.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Systems Director: 6.3.2.2

xen (Alpine package): 1.42

xen (Alpine package): 1.1.7-0ubuntu1 - 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):

xen (Alpine package): before 4.14.1-r0

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_systems_director:6.3.2.2:*:*:*:*:*:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.42:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:1.1.7-0ubuntu1:*:*:*:*: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:3.0.8-1:*:*:*:*:alpine_linux:*:*
• cpe:2.3:o:alpine:xen_alpine_package:3.0.13-1:*:*:*:*: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:*:*
• cpe:2.3:o:alpine:xen_alpine_package:*:*:*:*:*:alpine_linux:*:3.12

External links

https://git.alpinelinux.org/aports/commit/?id=1f5fe5eb0e0bb4588f6b1b8b4e1563293acbb087

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.