CWE-59

Improper Link Resolution Before File Access ('Link Following')

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.

CVE-2014-1420 (GCVE-0-2014-1420)
Vulnerability from cvelistv5
Published
2020-09-10 23:55
Modified
2024-09-16 17:08
Severity ?
3.8 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Summary
On desktop, Ubuntu UI Toolkit's StateSaver would serialise data on tmp/ files which an attacker could use to expose potentially sensitive data. StateSaver would also open files without the O_EXCL flag. An attacker could exploit this to launch a symlink attack, though this is partially mitigated by symlink and hardlink restrictions in Ubuntu. Fixed in 1.1.1188+14.10.20140813.4-0ubuntu1.
References
Impacted products
Vendor Product Version
Canonical ubuntu-ui-toolkit Version: 1.1.1188   < 1.1.1188+14.10.20140813.4-0ubuntu1
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CVE-2016-8641 (GCVE-0-2016-8641)
Vulnerability from cvelistv5
Published
2018-08-01 14:00
Modified
2024-08-06 02:27
Severity ?
6.7 (Medium) - CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE
Summary
A privilege escalation vulnerability was found in nagios 4.2.x that occurs in daemon-init.in when creating necessary files and insecurely changing the ownership afterwards. It's possible for the local attacker to create symbolic links before the files are to be created and possibly escalating the privileges with the ownership change.
References
Impacted products
Vendor Product Version
Nagios Enterprises nagios Version: 4.2.x
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CVE-2016-9602 (GCVE-0-2016-9602)
Vulnerability from cvelistv5
Published
2018-04-26 19:00
Modified
2024-08-06 02:59
Severity ?
7.6 (High) - CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE
Summary
Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.
References
Impacted products
Vendor Product Version
unspecified Qemu Version: qemu 2.9
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CVE-2017-12172 (GCVE-0-2017-12172)
Vulnerability from cvelistv5
Published
2017-11-22 19:00
Modified
2024-09-16 22:20
Severity ?
CWE
Summary
PostgreSQL 10.x before 10.1, 9.6.x before 9.6.6, 9.5.x before 9.5.10, 9.4.x before 9.4.15, 9.3.x before 9.3.20, and 9.2.x before 9.2.24 runs under a non-root operating system account, and database superusers have effective ability to run arbitrary code under that system account. PostgreSQL provides a script for starting the database server during system boot. Packages of PostgreSQL for many operating systems provide their own, packager-authored startup implementations. Several implementations use a log file name that the database superuser can replace with a symbolic link. As root, they open(), chmod() and/or chown() this log file name. This often suffices for the database superuser to escalate to root privileges when root starts the server.
References
https://access.redhat.com/errata/RHSA-2017:3402 vendor-advisory, x_refsource_REDHAT
http://www.securityfocus.com/bid/101949 vdb-entry, x_refsource_BID
https://access.redhat.com/errata/RHSA-2017:3403 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:3405 vendor-advisory, x_refsource_REDHAT
https://www.postgresql.org/support/security/ x_refsource_MISC
http://www.securitytracker.com/id/1039752 vdb-entry, x_refsource_SECTRACK
https://www.postgresql.org/about/news/1801/ x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2017:3404 vendor-advisory, x_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat, Inc. postgresql Version: 10.x before 10.1, 9.6.x before 9.6.6, 9.5.x before 9.5.10, 9.4.x before 9.4.15, 9.3.x before 9.3.20, 9.2.x before 9.2.24
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2017-12258 (GCVE-0-2017-12258)
Vulnerability from cvelistv5
Published
2017-10-05 07:00
Modified
2024-08-05 18:28
Severity ?
CWE
Summary
A vulnerability in the web-based UI of Cisco Unified Communications Manager could allow an unauthenticated, remote attacker to execute a cross-frame scripting (XFS) attack. The vulnerability exists because the affected software does not provide sufficient protections for HTML inline frames (iframes). An attacker could exploit this vulnerability by directing a user of the affected software to an attacker-controlled web page that contains a malicious HTML inline frame. A successful exploit could allow the attacker to conduct click-jacking or other types of client-side browser attacks. Cisco Bug IDs: CSCve60993.
References
Impacted products
Vendor Product Version
n/a Cisco Unified Communications Manager Version: Cisco Unified Communications Manager
Show details on NVD website

To clipboard 

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CVE-2017-15097 (GCVE-0-2017-15097)
Vulnerability from cvelistv5
Published
2018-07-27 20:00
Modified
2024-08-05 19:50
Severity ?
6.5 (Medium) - CVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
CWE
Summary
Privilege escalation flaws were found in the Red Hat initialization scripts of PostgreSQL. An attacker with access to the postgres user account could use these flaws to obtain root access on the server machine.
References
https://access.redhat.com/errata/RHSA-2017:3402 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:3403 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2017:3405 vendor-advisory, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-15097 x_refsource_CONFIRM
http://www.securitytracker.com/id/1039983 vdb-entry, x_refsource_SECTRACK
https://access.redhat.com/errata/RHSA-2017:3404 vendor-advisory, x_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat postgresql init script Version: all
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2017-7500 (GCVE-0-2017-7500)
Vulnerability from cvelistv5
Published
2018-08-13 17:00
Modified
2024-08-05 16:04
Severity ?
7.3 (High) - CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE
Summary
It was found that rpm did not properly handle RPM installations when a destination path was a symbolic link to a directory, possibly changing ownership and permissions of an arbitrary directory, and RPM files being placed in an arbitrary destination. An attacker, with write access to a directory in which a subdirectory will be installed, could redirect that directory to an arbitrary location and gain root privilege.
References
Impacted products
Vendor Product Version
[UNKNOWN] rpm Version: 4.13.0.2
Version: 4.14.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2017-7501 (GCVE-0-2017-7501)
Vulnerability from cvelistv5
Published
2017-11-22 22:00
Modified
2024-09-17 00:02
Severity ?
CWE
Summary
It was found that versions of rpm before 4.13.0.2 use temporary files with predictable names when installing an RPM. An attacker with ability to write in a directory where files will be installed could create symbolic links to an arbitrary location and modify content, and possibly permissions to arbitrary files, which could be used for denial of service or possibly privilege escalation.
References
Impacted products
Vendor Product Version
Red Hat, Inc. rpm Version: before 4.13.0.2
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2018-1063 (GCVE-0-2018-1063)
Vulnerability from cvelistv5
Published
2018-03-02 15:00
Modified
2024-08-05 03:51
Severity ?
CWE
Summary
Context relabeling of filesystems is vulnerable to symbolic link attack, allowing a local, unprivileged malicious entity to change the SELinux context of an arbitrary file to a context with few restrictions. This only happens when the relabeling process is done, usually when taking SELinux state from disabled to enable (permissive or enforcing). The issue was found in policycoreutils 2.5-11.
References
Impacted products
Vendor Product Version
SELinux Project policycoreutils Version: 2.5-11 and newer
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2018-10897 (GCVE-0-2018-10897)
Vulnerability from cvelistv5
Published
2018-08-01 17:00
Modified
2024-08-05 07:54
Severity ?
8.8 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Summary
A directory traversal issue was found in reposync, a part of yum-utils, where reposync fails to sanitize paths in remote repository configuration files. If an attacker controls a repository, they may be able to copy files outside of the destination directory on the targeted system via path traversal. If reposync is running with heightened privileges on a targeted system, this flaw could potentially result in system compromise via the overwriting of critical system files. Version 1.1.31 and older are believed to be affected.
References
Impacted products
Vendor Product Version
The RPM Project yum-utils: Version: 1.1.31
 Create a notification for this product.
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            "url": "https://github.com/rpm-software-management/yum-utils/pull/43"
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        "title": "CVE Program Container"
      }
    ],
    "cna": {
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        {
          "product": "yum-utils:",
          "vendor": "The RPM Project",
          "versions": [
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              "version": "1.1.31"
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      "datePublic": "2018-07-11T00:00:00",
      "descriptions": [
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          "lang": "en",
          "value": "A directory traversal issue was found in reposync, a part of yum-utils, where reposync fails to sanitize paths in remote repository configuration files. If an attacker controls a repository, they may be able to copy files outside of the destination directory on the targeted system via path traversal. If reposync is running with heightened privileges on a targeted system, this flaw could potentially result in system compromise via the overwriting of critical system files. Version 1.1.31 and older are believed to be affected."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.0"
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      ],
      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2018-11-30T20:57:01",
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          "url": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0"
        },
        {
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          "url": "https://github.com/rpm-software-management/yum-utils/pull/43"
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  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2018-10897",
    "datePublished": "2018-08-01T17:00:00",
    "dateReserved": "2018-05-09T00:00:00",
    "dateUpdated": "2024-08-05T07:54:34.911Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}
Mitigation ID: MIT-48.1

Phase: Architecture and Design

Strategy: Separation of Privilege

Description:

  • 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.

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