Medium severity · published Sep 24, 2021
CVE-2021-41581
x509_constraints_parse_mailbox in lib/libcrypto/x509/x509_constraints.c in LibreSSL through 3.4.0 has a stack-based buffer over-read
5.5
CVSS
0.6%
EPSS
No
On KEV
Description
x509_constraints_parse_mailbox in lib/libcrypto/x509/x509_constraints.c in LibreSSL through 3.4.0 has a stack-based buffer over-read. When the input exceeds DOMAIN_PART_MAX_LEN, the buffer lacks '\0' termination.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libressl · Openbsd
through 3.4.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-41581
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-41581
Exploit
https://github.com/libressl-portable/openbsd/issues/126
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