CVE-2021-3404 — HIGH (7.8) — White Hats Nepal

Vulnerability Description

In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a heap buffer overflow which can be triggered via a crafted file.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Ytnef Project	Ytnef	1.9.3
Redhat	Enterprise Linux	7.0
Fedoraproject	Fedora	33

Related Weaknesses (CWE)

CWE-119 CWE-787

References

https://bugzilla.redhat.com/show_bug.cgi?id=1926965Issue TrackingThird Party Advisory
https://github.com/Yeraze/ytnef/issues/86ExploitIssue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1926965Issue TrackingThird Party Advisory
https://github.com/Yeraze/ytnef/issues/86ExploitIssue TrackingThird Party Advisory

FAQ

What is CVE-2021-3404?

CVE-2021-3404 is a vulnerability with a CVSS score of 7.8 (HIGH). In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a heap buffer overflow which can be triggered via a cr...

How severe is CVE-2021-3404?

CVE-2021-3404 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-2021-3404?

Check the references section above for vendor advisories and patch information. Affected products include: Ytnef Project Ytnef, Redhat Enterprise Linux, Fedoraproject Fedora.