Vulnerability Name:

CVE-2020-15229 (CCN-189848)

Assigned:2020-10-13
Published:2020-10-13
Updated:2022-11-16
Summary:Singularity (an open source container platform) from version 3.1.1 through 3.6.3 has a vulnerability. Due to insecure handling of path traversal and the lack of path sanitization within `unsquashfs`, it is possible to overwrite/create any files on the host filesystem during the extraction with a crafted squashfs filesystem. The extraction occurs automatically for unprivileged (either installation or with `allow setuid = no`) run of Singularity when a user attempt to run an image which is a local SIF image or a single file containing a squashfs filesystem and is coming from remote sources `library://` or `shub://`. Image build is also impacted in a more serious way as it can be used by a root user, allowing an attacker to overwrite/create files leading to a system compromise, so far bootstrap methods `library`, `shub` and `localimage` are triggering the squashfs extraction. This issue is addressed in Singularity 3.6.4. All users are advised to upgrade to 3.6.4 especially if they use Singularity mainly for building image as root user. There is no solid workaround except to temporary avoid to use unprivileged mode with single file images in favor of sandbox images instead. Regarding image build, temporary avoid to build from `library` and `shub` sources and as much as possible use `--fakeroot` or a VM for that.
CVSS v3 Severity:9.3 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N)
8.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): None
8.2 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N)
7.1 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:5.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-22
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-15229

Source: SUSE
Type: Broken Link, Mailing List, Third Party Advisory
openSUSE-SU-2020:1770

Source: SUSE
Type: Broken Link, Mailing List, Third Party Advisory
openSUSE-SU-2020:1769

Source: SUSE
Type: Broken Link, Mailing List, Third Party Advisory
openSUSE-SU-2020:1814

Source: XF
Type: UNKNOWN
singularity-cve202015229-dir-trav(189848)

Source: MISC
Type: Release Notes, Third Party Advisory
https://github.com/hpcng/singularity/blob/v3.6.4/CHANGELOG.md#security-related-fixes

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/hpcng/singularity/commit/eba3dea260b117198fdb6faf41f2482ab2f8d53e

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/hpcng/singularity/pull/5611

Source: CCN
Type: Singularity GIT Repository
Path traversal and files overwrite with unsquashfs

Source: CONFIRM
Type: Third Party Advisory
https://github.com/hpcng/singularity/security/advisories/GHSA-7gcp-w6ww-2xv9

Source: CCN
Type: Sylabs Web site
Singularity

Vulnerable Configuration:Configuration 1:
  • cpe:/a:sylabs:singularity:*:*:*:*:*:*:*:* (Version >= 3.1.1 and <= 3.6.3)

  • Configuration 2:
  • cpe:/o:opensuse:leap:15.1:*:*:*:*:*:*:*
  • OR cpe:/o:opensuse:leap:15.2:*:*:*:*:*:*:*
  • OR cpe:/a:opensuse:backports_sle:15.0:sp2:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/a:sylabs:singularity:3.1.0:-:*:*:*:*:*:*
  • OR cpe:/a:sylabs:singularity:3.1.1:-:*:*:*:*:*:*
  • OR cpe:/a:sylabs:singularity:3.2.0:rc2:*:*:*:*:*:*
  • OR cpe:/a:sylabs:singularity:3.3.0:-:*:*:*:*:*:*
  • OR cpe:/a:sylabs:singularity:3.5.1:-:*:*:*:*:*:*
  • OR cpe:/a:sylabs:singularity:3.6.2:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:202015229
    V
    CVE-2020-15229
    2022-06-30
    oval:org.opensuse.security:def:113439
    P
    singularity-3.8.3-1.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:64781
    P
    Security update for strongswan (Important)
    2021-10-19
    oval:org.opensuse.security:def:106840
    P
    singularity-3.8.3-1.2 on GA media (Moderate)
    2021-10-01
    oval:org.opensuse.security:def:64580
    P
    Security update for gd (Moderate)
    2021-09-27
    oval:org.opensuse.security:def:63191
    P
    389-ds-1.4.0.3-2.39 on GA media (Moderate)
    2021-09-21
    oval:org.opensuse.security:def:63133
    P
    terraform-provider-helm-1.3.2-6.3.1 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:63336
    P
    libcacard-devel-2.5.3-1.27 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:63126
    P
    kernel-azure-base-4.12.14-8.58.1 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:63130
    P
    python3-keystoneclient-4.0.0-9.4.5 on GA media (Moderate)
    2021-08-10
    oval:org.opensuse.security:def:62735
    P
    conky-1.11.5-1.20 on GA media (Moderate)
    2021-08-09
    oval:org.opensuse.security:def:74646
    P
    Security update for go1.16 (Important)
    2021-06-28
    oval:org.opensuse.security:def:64537
    P
    Security update for libnettle (Important)
    2021-06-23
    oval:org.opensuse.security:def:64883
    P
    Security update for containerd, docker, runc (Important)
    2021-06-11
    oval:org.opensuse.security:def:63531
    P
    colord-1.4.2-1.37 on GA media (Moderate)
    2021-06-08
    oval:org.opensuse.security:def:64468
    P
    Security update for wpa_supplicant (Moderate)
    2021-04-13
    oval:org.opensuse.security:def:64673
    P
    Security update for ldb (Important)
    2021-03-24
    oval:org.opensuse.security:def:64674
    P
    Security update for python3 (Moderate)
    2021-03-24
    oval:org.opensuse.security:def:64324
    P
    Security update for sudo (Important)
    2021-01-26
    oval:org.opensuse.security:def:63158
    P
    libecpg6-10.3-2.8 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:63629
    P
    libopencv3_3-3.3.1-6.6.1 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:62712
    P
    perl-File-Path-2.150000-1.22 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:62912
    P
    openldap2-devel-32bit-2.4.46-9.3.1 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:62711
    P
    open-vm-tools-desktop-11.1.0-2.2 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:63393
    P
    tomcat-9.0.5-1.34 on GA media (Moderate)
    2020-12-03
    oval:org.opensuse.security:def:74995
    P
    Security update for LibVNCServer (Important)
    2020-12-01
    oval:org.opensuse.security:def:64426
    P
    pam on GA media (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:64084
    P
    Security update for bcm43xx-firmware (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:63979
    P
    Security update for java-1_8_0-ibm (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:65053
    P
    Security update for freetype2 (Important)
    2020-12-01
    oval:org.opensuse.security:def:63757
    P
    Security update for evince (Important)
    2020-12-01
    oval:org.opensuse.security:def:75128
    P
    Security update for singularity (Important)
    2020-12-01
    oval:org.opensuse.security:def:64218
    P
    bash on GA media (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:63832
    P
    Security update for aspell (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:74520
    P
    Security update for perl-YAML-LibYAML (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:64208
    P
    apache-commons-httpclient on GA media (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:64941
    P
    Security update for git (Moderate)
    2020-12-01
    oval:org.opensuse.security:def:109728
    P
    Security update for singularity (Important)
    2020-11-02
    oval:org.opensuse.security:def:96381
    P
    Security update for singularity (Important)
    2020-11-02
    oval:org.opensuse.security:def:103071
    P
    Security update for singularity (Important)
    2020-11-02
    oval:org.opensuse.security:def:110270
    P
    Security update for singularity (Important)
    2020-10-29
    oval:org.opensuse.security:def:110823
    P
    Security update for singularity (Important)
    2020-10-29
    BACK
    sylabs singularity *
    opensuse leap 15.1
    opensuse leap 15.2
    opensuse backports sle 15.0 sp2
    sylabs singularity 3.1.0 -
    sylabs singularity 3.1.1 -
    sylabs singularity 3.2.0 rc2
    sylabs singularity 3.3.0 -
    sylabs singularity 3.5.1 -
    sylabs singularity 3.6.2