Common Weakness Enumeration
CWE-59
AllowedImproper Link Resolution Before File Access ('Link Following')
Abstraction: Base · Status: Draft
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
1990 vulnerabilities reference this CWE, most recent first.
CVE-2021-35937 (GCVE-0-2021-35937)
Vulnerability from cvelistv5 – Published: 2022-08-25 00:00 – Updated: 2024-08-04 00:40
VLAI
EPSS
VEX
Summary
A race condition vulnerability was found in rpm. A local unprivileged user could use this flaw to bypass the checks that were introduced in response to CVE-2017-7500 and CVE-2017-7501, potentially gaining root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Severity
No CVSS data available.
CWE
- CWE-59 - - Improper Link Resolution Before File Access ('Link Following'), CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
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CVE-2021-32557 (GCVE-0-2021-32557)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 17:53
VLAI
EPSS
VEX
Title
apport process_report() arbitrary file write
Summary
It was discovered that the process_report() function in data/whoopsie-upload-all allowed arbitrary file writes via symlinks.
Severity
5.2 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
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Date Public
2021-05-25 00:00
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CVE-2021-32555 (GCVE-0-2021-32555)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 20:47
VLAI
EPSS
VEX
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the xorg-hwe-18.04 package apport hooks, it could expose private data to other local users.
Severity
7.3 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
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Date Public
2021-05-25 00:00
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CVE-2021-32554 (GCVE-0-2021-32554)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 23:20
VLAI
EPSS
VEX
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the xorg package apport hooks, it could expose private data to other local users.
Severity
7.3 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
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Date Public
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CVE-2021-32553 (GCVE-0-2021-32553)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 22:51
VLAI
EPSS
VEX
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-17 package apport hooks, it could expose private data to other local users.
Severity
7.3 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
Affected: 2.20.9 , < 2.20.9-0ubuntu7.24 (custom) Affected: 2.20.11-0ubuntu27 , < 2.20.11-0ubuntu27.18 (custom) Affected: 2.20.11-0ubuntu50 , < 2.20.11-0ubuntu50.7 (custom) Affected: 2.20.11-0ubuntu65 , < 2.20.11-0ubuntu65.1 (custom) Affected: 2.14.1-0ubuntu3 , < 2.14.1-0ubuntu3.29+esm7 (custom) |
Date Public
2021-05-25 00:00
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CVE-2021-32552 (GCVE-0-2021-32552)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-17 02:37
VLAI
EPSS
VEX
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-16 package apport hooks, it could expose private data to other local users.
Severity
7.3 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
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Date Public
2021-05-25 00:00
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CVE-2021-32551 (GCVE-0-2021-32551)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 20:21
VLAI
EPSS
VEX
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-15 package apport hooks, it could expose private data to other local users.
Severity
7.3 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
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Date Public
2021-05-25 00:00
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CVE-2021-32550 (GCVE-0-2021-32550)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 23:22
VLAI
EPSS
VEX
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-14 package apport hooks, it could expose private data to other local users.
Severity
7.3 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
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Date Public
2021-05-25 00:00
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CVE-2021-32549 (GCVE-0-2021-32549)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 23:11
VLAI
EPSS
VEX
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-13 package apport hooks, it could expose private data to other local users.
Severity
7.3 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
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|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
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Date Public
2021-05-25 00:00
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CVE-2021-32548 (GCVE-0-2021-32548)
Vulnerability from cvelistv5 – Published: 2021-06-12 03:40 – Updated: 2024-09-16 18:29
VLAI
EPSS
VEX
Title
apport read_file() function could follow maliciously constructed symbolic links
Summary
It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the openjdk-8 package apport hooks, it could expose private data to other local users.
Severity
7.3 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugs.launchpad.net/ubuntu/+source/apport/… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | apport |
Affected:
2.20.1 , < 2.20.1-0ubuntu2.30+esm1
(custom)
Affected: 2.20.9 , < 2.20.9-0ubuntu7.24 (custom) Affected: 2.20.11-0ubuntu27 , < 2.20.11-0ubuntu27.18 (custom) Affected: 2.20.11-0ubuntu50 , < 2.20.11-0ubuntu50.7 (custom) Affected: 2.20.11-0ubuntu65 , < 2.20.11-0ubuntu65.1 (custom) Affected: 2.14.1-0ubuntu3 , < 2.14.1-0ubuntu3.29+esm7 (custom) |
Date Public
2021-05-25 00:00
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Mitigation MIT-48.1
Architecture and Design
Strategy: Separation of Privilege
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
CAPEC-132: Symlink Attack
An adversary positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name.
CAPEC-17: Using Malicious Files
An attack of this type exploits a system's configuration that allows an adversary to either directly access an executable file, for example through shell access; or in a possible worst case allows an adversary to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
CAPEC-35: Leverage Executable Code in Non-Executable Files
An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.
CAPEC-76: Manipulating Web Input to File System Calls
An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.