Vulnerability Details : 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 be triggered via a crafted file.
Vulnerability category: OverflowMemory CorruptionDenial of service
Products affected by CVE-2021-3404
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:a:ytnef_project:ytnef:1.9.3:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3404
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 45 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3404
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2021-3404
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: secalert@redhat.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-3404
-
https://bugzilla.redhat.com/show_bug.cgi?id=1926965
1926965 – (CVE-2021-3404) CVE-2021-3404 ytnef: heap-based buffer overflow in SwapWord function in lib/ytnef.c via crafted fileIssue Tracking;Third Party Advisory
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https://github.com/Yeraze/ytnef/issues/86
Heap buffer overflow via TNEFVersion · Issue #86 · Yeraze/ytnef · GitHubExploit;Issue Tracking;Third Party Advisory
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