Vulnerability Details : CVE-2021-20314
Stack buffer overflow in libspf2 versions below 1.2.11 when processing certain SPF macros can lead to Denial of service and potentially code execution via malicious crafted SPF explanation messages.
Vulnerability category: OverflowMemory CorruptionDenial of service
Products affected by CVE-2021-20314
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:a:libspf2:libspf2:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20314
0.17%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 35 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20314
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2021-20314
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20314
-
https://bugzilla.redhat.com/show_bug.cgi?id=1993070
1993070 – (CVE-2021-20314) CVE-2021-20314 libspf2: stack buffer overflow when processing SPF explanation macrosIssue Tracking;Patch;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMSFT2NJDZ7PATRZSQPAOGSE7JD6ELOB/
[SECURITY] Fedora 35 Update: libspf2-1.2.11-1.20210922git4915c308.fc35 - package-announce - Fedora Mailing-Lists
-
https://security.gentoo.org/glsa/202401-22
libspf2: Multiple vulnerabilities (GLSA 202401-22) — Gentoo security
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https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJRHPE5OSCPTNA3ZZ4ORDHT4JQH3Y4/
[SECURITY] Fedora 34 Update: libspf2-1.2.11-1.20210922git4915c308.fc34 - package-announce - Fedora Mailing-Lists
-
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y6T4HYXXSUQCGJB2ES6X7Q74YYF7V7XU/
[SECURITY] Fedora 33 Update: libspf2-1.2.11-1.20210922git4915c308.fc33 - package-announce - Fedora Mailing-Lists
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