CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.
CVE-2020-15702 (GCVE-0-2020-15702)
Vulnerability from cvelistv5 – Published: 2020-08-06 22:50 – Updated: 2025-11-03 19:25
VLAI
Title
TOCTOU in apport
Summary
TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/4449-1 | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4449-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
| https://usn.ubuntu.com/4449-2/ | vendor-advisoryx_refsource_UBUNTU |
Impacted products
Date Public
2020-08-04 00:00
Credits
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CVE-2020-1630 (GCVE-0-2020-1630)
Vulnerability from cvelistv5 – Published: 2020-04-08 19:26 – Updated: 2024-09-16 22:20
VLAI
Title
Junos OS: Privilege escalation vulnerability in dual REs, VC or HA cluster may allow unauthorized configuration change.
Summary
A privilege escalation vulnerability in Juniper Networks Junos OS devices configured with dual Routing Engines (RE), Virtual Chassis (VC) or high-availability cluster may allow a local authenticated low-privileged user with access to the shell to perform unauthorized configuration modification. This issue does not affect Junos OS device with single RE or stand-alone configuration. This issue affects Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S14; 12.3X48 versions prior to 12.3X48-D86, 12.3X48-D90; 14.1X53 versions prior to 14.1X53-D51; 15.1 versions prior to 15.1R7-S6; 15.1X49 versions prior to 15.1X49-D181, 15.1X49-D190; 15.1X53 versions prior to 15.1X53-D592; 16.1 versions prior to 16.1R4-S13, 16.1R7-S6; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R3-S3; 17.3 versions prior to 17.3R3-S6; 17.4 versions prior to 17.4R2-S6, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R2-S5, 18.2R3-S1; 18.2 versions prior to 18.2X75-D12, 18.2X75-D33, 18.2X75-D420, 18.2X75-D60, 18.2X75-D411; 18.3 versions prior to 18.3R1-S5, 18.3R2-S1, 18.3R3; 18.4 versions prior to 18.4R1-S4, 18.4R2-S1, 18.4R3; 19.1 versions prior to 19.1R1-S2, 19.1R2; 19.2 versions prior to 19.2R1-S1, 19.2R2.
Severity
5 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://kb.juniper.net/JSA11010 | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
12.3 , < 12.3R12-S14
(custom)
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Date Public
2020-04-08 00:00
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CVE-2020-2032 (GCVE-0-2020-2032)
Vulnerability from cvelistv5 – Published: 2020-06-10 17:29 – Updated: 2024-09-17 02:27
VLAI
Title
GlobalProtect App: File race condition vulnerability leads to local privilege escalation during upgrade
Summary
A race condition vulnerability Palo Alto Networks GlobalProtect app on Windows allows a local limited Windows user to execute programs with SYSTEM privileges. This issue can be exploited only while performing a GlobalProtect app upgrade. This issue affects: GlobalProtect app 5.0 versions earlier than GlobalProtect app 5.0.10 on Windows; GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.4 on Windows.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.paloaltonetworks.com/CVE-2020-2032 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Palo Alto Networks | GlobalProtect App |
Affected:
5.1 , < 5.1.4
(custom)
Affected: 5.0 , < 5.0.10 (custom) |
Date Public
2020-06-10 00:00
Credits
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CVE-2020-24428 (GCVE-0-2020-24428)
Vulnerability from cvelistv5 – Published: 2020-11-05 19:31 – Updated: 2024-09-16 20:21
VLAI
Title
Acrobat Reader DC for macOS Race Condition Vulnerability Could Lead to Privilege Escalation
Summary
Acrobat Reader DC versions 2020.012.20048 (and earlier), 2020.001.30005 (and earlier) and 2017.011.30175 (and earlier) for macOS are affected by a time-of-check time-of-use (TOCTOU) race condition vulnerability that could result in local privilege escalation. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Severity
7.7 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://helpx.adobe.com/security/products/acrobat… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Acrobat Reader |
Affected:
unspecified , ≤ 2017.011.30175
(custom)
Affected: unspecified , ≤ 2020.012.20048 (custom) Affected: unspecified , ≤ 2020.001.30005 (custom) Affected: unspecified , ≤ None (custom) |
Date Public
2020-11-03 00:00
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CVE-2020-25860 (GCVE-0-2020-25860)
Vulnerability from cvelistv5 – Published: 2020-12-21 17:23 – Updated: 2024-08-04 15:49
VLAI
Summary
The install.c module in the Pengutronix RAUC update client prior to version 1.5 has a Time-of-Check Time-of-Use vulnerability, where signature verification on an update file takes place before the file is reopened for installation. An attacker who can modify the update file just before it is reopened can install arbitrary code on the device.
Severity
No CVSS data available.
CWE
- CWE-367 - Time-of-Check Time-of-Use (CWE-367)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/rauc/rauc/security/advisories/… | x_refsource_MISC |
| https://www.vdoo.com/blog/cve-2020-25860-signific… | x_refsource_MISC |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Pengutronix RAUC |
Affected:
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|
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CVE-2020-27252 (GCVE-0-2020-27252)
Vulnerability from cvelistv5 – Published: 2020-12-14 19:19 – Updated: 2025-05-22 19:39
VLAI
Title
Medtronic MyCareLink Smart Time-of-check Time-of-use Race Condition
Summary
Medtronic MyCareLink Smart 25000 is
vulnerable to a race condition in the MCL Smart Patient Reader software update system, which allows unsigned firmware to be uploaded and executed on the Patient Reader. If exploited, an attacker could remotely execute code on the MCL Smart Patient Reader device, leading to control of the device.
Severity
8.8 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://global.medtronic.com/xg-en/product-securi… | x_refsource_MISC |
| https://www.cisa.gov/news-events/ics-medical-advi… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Medtronic | Smart Model 25000 Patient Reader |
Affected:
All versions
|
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CVE-2020-8016 (GCVE-0-2020-8016)
Vulnerability from cvelistv5 – Published: 2020-04-02 14:05 – Updated: 2024-09-16 19:30
VLAI
Title
race condition in the packaging of texlive-filesysten
Summary
A Race Condition Enabling Link Following vulnerability in the packaging of texlive-filesystem of SUSE Linux Enterprise Module for Desktop Applications 15-SP1, SUSE Linux Enterprise Software Development Kit 12-SP4, SUSE Linux Enterprise Software Development Kit 12-SP5; openSUSE Leap 15.1 allows local users to corrupt files or potentially escalate privileges. This issue affects: SUSE Linux Enterprise Module for Desktop Applications 15-SP1 texlive-filesystem versions prior to 2017.135-9.5.1. SUSE Linux Enterprise Software Development Kit 12-SP4 texlive-filesystem versions prior to 2013.74-16.5.1. SUSE Linux Enterprise Software Development Kit 12-SP5 texlive-filesystem versions prior to 2013.74-16.5.1. openSUSE Leap 15.1 texlive-filesystem versions prior to 2017.135-lp151.8.3.1.
Severity
4.9 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1159740 |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| SUSE | SUSE Linux Enterprise Module for Desktop Applications 15-SP1 |
Affected:
texlive-filesystem , < 2017.135-9.5.1
(custom)
|
|
| SUSE | SUSE Linux Enterprise Software Development Kit 12-SP4 |
Affected:
texlive-filesystem , < 2013.74-16.5.1
(custom)
|
|
| SUSE | SUSE Linux Enterprise Software Development Kit 12-SP5 |
Affected:
texlive-filesystem , < 2013.74-16.5.1
(custom)
|
|
| openSUSE | openSUSE Leap 15.1 |
Affected:
texlive-filesystem , < 2017.135-lp151.8.3.1
(custom)
|
Date Public
2020-04-01 00:00
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CVE-2020-8017 (GCVE-0-2020-8017)
Vulnerability from cvelistv5 – Published: 2020-04-02 14:05 – Updated: 2024-09-17 01:50
VLAI
Title
race condition on texlive-filesystem cron job allows for the deletion of unintended files
Summary
A Race Condition Enabling Link Following vulnerability in the cron job shipped with texlive-filesystem of SUSE Linux Enterprise Module for Desktop Applications 15-SP1, SUSE Linux Enterprise Software Development Kit 12-SP4, SUSE Linux Enterprise Software Development Kit 12-SP5; openSUSE Leap 15.1 allows local users in group mktex to delete arbitrary files on the system This issue affects: SUSE Linux Enterprise Module for Desktop Applications 15-SP1 texlive-filesystem versions prior to 2017.135-9.5.1. SUSE Linux Enterprise Software Development Kit 12-SP4 texlive-filesystem versions prior to 2013.74-16.5.1. SUSE Linux Enterprise Software Development Kit 12-SP5 texlive-filesystem versions prior to 2013.74-16.5.1. openSUSE Leap 15.1 texlive-filesystem versions prior to 2017.135-lp151.8.3.1.
Severity
6.2 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
2 references
| URL | Tags |
|---|---|
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1158910 |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| SUSE | SUSE Linux Enterprise Module for Desktop Applications 15-SP1 |
Affected:
texlive-filesystem , < 2017.135-9.5.1
(custom)
|
|
| SUSE | SUSE Linux Enterprise Software Development Kit 12-SP4 |
Affected:
texlive-filesystem , < 2013.74-16.5.1
(custom)
|
|
| SUSE | SUSE Linux Enterprise Software Development Kit 12-SP5 |
Affected:
texlive-filesystem , < 2013.74-16.5.1
(custom)
|
|
| openSUSE | openSUSE Leap 15.1 |
Affected:
texlive-filesystem , < 2017.135-lp151.8.3.1
(custom)
|
Date Public
2020-04-02 00:00
Credits
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CVE-2020-8332 (GCVE-0-2020-8332)
Vulnerability from cvelistv5 – Published: 2020-10-14 21:25 – Updated: 2024-08-04 09:56
VLAI
Summary
A potential vulnerability in the SMI callback function used in the legacy BIOS mode USB drivers in some legacy Lenovo and IBM System x servers may allow arbitrary code execution. Servers operating in UEFI mode are not affected.
Severity
6.4 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://support.lenovo.com/us/en/product_security… | x_refsource_MISC |
Impacted products
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CVE-2020-8342 (GCVE-0-2020-8342)
Vulnerability from cvelistv5 – Published: 2020-09-15 14:20 – Updated: 2024-09-17 00:01
VLAI
Summary
A race condition vulnerability was reported in Lenovo System Update prior to version 5.07.0106 that could allow escalation of privilege.
Severity
7.3 (High)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://support.lenovo.com/us/en/product_security… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Lenovo | System Update |
Affected:
unspecified , < 5.07.0106
(custom)
|
Date Public
2020-09-15 00:00
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Mitigation
Phase: Implementation
Description:
- The most basic advice for TOCTOU vulnerabilities is to not perform a check before the use. This does not resolve the underlying issue of the execution of a function on a resource whose state and identity cannot be assured, but it does help to limit the false sense of security given by the check.
Mitigation
Phase: Implementation
Description:
- When the file being altered is owned by the current user and group, set the effective gid and uid to that of the current user and group when executing this statement.
Mitigation
Phase: Architecture and Design
Description:
- Limit the interleaving of operations on files from multiple processes.
Mitigation
Phases: Implementation, Architecture and Design
Description:
- If you cannot perform operations atomically and you must share access to the resource between multiple processes or threads, then try to limit the amount of time (CPU cycles) between the check and use of the resource. This will not fix the problem, but it could make it more difficult for an attack to succeed.
Mitigation
Phase: Implementation
Description:
- Recheck the resource after the use call to verify that the action was taken appropriately.
Mitigation
Phase: Architecture and Design
Description:
- Ensure that some environmental locking mechanism can be used to protect resources effectively.
Mitigation
Phase: Implementation
Description:
- Ensure that locking occurs before the check, as opposed to afterwards, such that the resource, as checked, is the same as it is when in use.
CAPEC-27: Leveraging Race Conditions via Symbolic Links
This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.
CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.