Vulnerability Description
Within the function HandleFileArg the argument filepattern is under control of the user who passes it in from the command line. filepattern is passed directly to strlen to determine the ending location of the char* passed in by the user, no checks are done to see if the passed in char* is longer than the staticly sized buffer data is memcpy‘d into, but after the memcpy a null byte is written to what is assumed to be the end of the buffer to terminate the char*, but without length checks, this null write occurs at an arbitrary offset from the buffer. An attacker can provide malicious input to trigger this vulnerability.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Att | Xmill | 0.7 |
Related Weaknesses (CWE)
References
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1280ExploitThird Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1280ExploitThird Party Advisory
FAQ
What is CVE-2021-21814?
CVE-2021-21814 is a vulnerability with a CVSS score of 7.8 (HIGH). Within the function HandleFileArg the argument filepattern is under control of the user who passes it in from the command line. filepattern is passed directly to strlen to determine the ending locatio...
How severe is CVE-2021-21814?
CVE-2021-21814 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21814?
Check the references section above for vendor advisories and patch information. Affected products include: Att Xmill.