CVE-2021-31155
HIGHCVSS 7.8/10EPSS 0.41%
Last modified
CVE-2021-31155 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Failure to normalize the umask in please before 0.4 allows a local attacker to gain full root privileges if they are allowed to execute at least one command.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.
Description
Failure to normalize the umask in please before 0.4 allows a local attacker to gain full root privileges if they are allowed to execute at least one command.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Umask Project | Umask | < 0.4 |
References
- https://gitlab.com/edneville/please/-/tree/master/src/binThird Party Advisory
- https://www.openwall.com/lists/oss-security/2021/05/18/1Exploit, Mailing List, Third Party Advisory
- https://gitlab.com/edneville/please/-/tree/master/src/binThird Party Advisory
- https://www.openwall.com/lists/oss-security/2021/05/18/1Exploit, Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-31155?
Failure to normalize the umask in please before 0.4 allows a local attacker to gain full root privileges if they are allowed to execute at least one command.
How severe is CVE-2021-31155?
CVE-2021-31155 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31155?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-31155?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST