5.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:P/A:P
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
8.4 High
AI Score
Confidence
High
0.012 Low
EPSS
Percentile
85.3%
Debian Security Advisory DSA-4967-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
September 04, 2021 https://www.debian.org/security/faq
Package : squashfs-tools
CVE ID : CVE-2021-40153
Etienne Stalmans discovered that unsquashfs in squashfs-tools, the tools
to create and extract Squashfs filesystems, does not validate filenames
for traversal outside of the destination directory. An attacker can take
advantage of this flaw for writing to arbitrary files to the filesystem
if a malformed Squashfs image is processed.
For the oldstable distribution (buster), this problem has been fixed
in version 1:4.3-12+deb10u1.
For the stable distribution (bullseye), this problem has been fixed in
version 1:4.4-2+deb11u1.
We recommend that you upgrade your squashfs-tools packages.
For the detailed security status of squashfs-tools please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/squashfs-tools
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: [email protected]
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 11 | arm64 | squashfs-tools-dbgsym | < 1:4.4-2+deb11u1 | squashfs-tools-dbgsym_1:4.4-2+deb11u1_arm64.deb |
Debian | 9 | arm64 | squashfs-tools | < 1:4.3-3+deb9u2 | squashfs-tools_1:4.3-3+deb9u2_arm64.deb |
Debian | 10 | ppc64el | squashfs-tools | < 1:4.3-12+deb10u1 | squashfs-tools_1:4.3-12+deb10u1_ppc64el.deb |
Debian | 10 | s390x | squashfs-tools | < 1:4.3-12+deb10u1 | squashfs-tools_1:4.3-12+deb10u1_s390x.deb |
Debian | 10 | mips | squashfs-tools | < 1:4.3-12+deb10u1 | squashfs-tools_1:4.3-12+deb10u1_mips.deb |
Debian | 9 | amd64 | squashfs-tools-dbg | < 1:4.3-3+deb9u2 | squashfs-tools-dbg_1:4.3-3+deb9u2_amd64.deb |
Debian | 11 | ppc64el | squashfs-tools | < 1:4.4-2+deb11u1 | squashfs-tools_1:4.4-2+deb11u1_ppc64el.deb |
Debian | 11 | armhf | squashfs-tools-dbgsym | < 1:4.4-2+deb11u1 | squashfs-tools-dbgsym_1:4.4-2+deb11u1_armhf.deb |
Debian | 11 | mipsel | squashfs-tools | < 1:4.4-2+deb11u1 | squashfs-tools_1:4.4-2+deb11u1_mipsel.deb |
Debian | 11 | mipsel | squashfs-tools-dbgsym | < 1:4.4-2+deb11u1 | squashfs-tools-dbgsym_1:4.4-2+deb11u1_mipsel.deb |
5.8 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:P/A:P
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
8.4 High
AI Score
Confidence
High
0.012 Low
EPSS
Percentile
85.3%