High severity · published Mar 4, 2021
CVE-2021-3404
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…
7.8
CVSS
1.9%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
7.0 · source: NVD
FE
Fedora · Fedoraproject
33 · source: NVD
YT
Ytnef · Ytnef Project
1.9.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3404
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3404
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1926965
Exploit
https://github.com/Yeraze/ytnef/issues/86
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