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
6.9 Medium
AI Score
Confidence
High
0.012 Low
EPSS
Percentile
85.3%
Issue Overview:
Integer overflow in the read_fragment_table_4 function in unsquash-4.c in Squashfs and sasquatch allows remote attackers to cause a denial of service (application crash) via a crafted input, which triggers a stack-based buffer overflow. (CVE-2015-4645)
(1) unsquash-1.c, (2) unsquash-2.c, (3) unsquash-3.c, and (4) unsquash-4.c in Squashfs and sasquatch allow remote attackers to cause a denial of service (application crash) via a crafted input. (CVE-2015-4646)
squashfs_opendir in unsquash-1.c in Squashfs-Tools 4.5 stores the filename in the directory entry; this is then used by unsquashfs to create the new file during the unsquash. The filename is not validated for traversal outside of the destination directory, and thus allows writing to locations outside of the destination. (CVE-2021-40153)
squashfs_opendir in unsquash-2.c in Squashfs-Tools 4.5 allows Directory Traversal, a different vulnerability than CVE-2021-40153. A squashfs filesystem that has been crafted to include a symbolic link and then contents under the same filename in a filesystem can cause unsquashfs to first create the symbolic link pointing outside the expected directory, and then the subsequent write operation will cause the unsquashfs process to write through the symbolic link elsewhere in the filesystem. (CVE-2021-41072)
Affected Packages:
squashfs-tools
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update squashfs-tools to update your system.
New Packages:
aarch64:
squashfs-tools-4.3-0.21.gitaae0aff4.amzn2.0.2.aarch64
squashfs-tools-debuginfo-4.3-0.21.gitaae0aff4.amzn2.0.2.aarch64
i686:
squashfs-tools-4.3-0.21.gitaae0aff4.amzn2.0.2.i686
squashfs-tools-debuginfo-4.3-0.21.gitaae0aff4.amzn2.0.2.i686
src:
squashfs-tools-4.3-0.21.gitaae0aff4.amzn2.0.2.src
x86_64:
squashfs-tools-4.3-0.21.gitaae0aff4.amzn2.0.2.x86_64
squashfs-tools-debuginfo-4.3-0.21.gitaae0aff4.amzn2.0.2.x86_64
Red Hat: CVE-2015-4645, CVE-2015-4646, CVE-2021-40153, CVE-2021-41072
Mitre: CVE-2015-4645, CVE-2015-4646, CVE-2021-40153, CVE-2021-41072
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | aarch64 | squashfs-tools | < 4.3-0.21.gitaae0aff4.amzn2.0.2 | squashfs-tools-4.3-0.21.gitaae0aff4.amzn2.0.2.aarch64.rpm |
Amazon Linux | 2 | aarch64 | squashfs-tools-debuginfo | < 4.3-0.21.gitaae0aff4.amzn2.0.2 | squashfs-tools-debuginfo-4.3-0.21.gitaae0aff4.amzn2.0.2.aarch64.rpm |
Amazon Linux | 2 | i686 | squashfs-tools | < 4.3-0.21.gitaae0aff4.amzn2.0.2 | squashfs-tools-4.3-0.21.gitaae0aff4.amzn2.0.2.i686.rpm |
Amazon Linux | 2 | i686 | squashfs-tools-debuginfo | < 4.3-0.21.gitaae0aff4.amzn2.0.2 | squashfs-tools-debuginfo-4.3-0.21.gitaae0aff4.amzn2.0.2.i686.rpm |
Amazon Linux | 2 | x86_64 | squashfs-tools | < 4.3-0.21.gitaae0aff4.amzn2.0.2 | squashfs-tools-4.3-0.21.gitaae0aff4.amzn2.0.2.x86_64.rpm |
Amazon Linux | 2 | x86_64 | squashfs-tools-debuginfo | < 4.3-0.21.gitaae0aff4.amzn2.0.2 | squashfs-tools-debuginfo-4.3-0.21.gitaae0aff4.amzn2.0.2.x86_64.rpm |
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
6.9 Medium
AI Score
Confidence
High
0.012 Low
EPSS
Percentile
85.3%