Critical severity · published Apr 15, 2023
CVE-2021-46880
x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows authentication bypass because an error for an unverified certificate chain is sometimes…
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows authentication bypass because an error for an unverified certificate chain is sometimes discarded.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libressl · Openbsd
before 3.4.2 · source: NVD
OP
Openbsd · Openbsd
before 7.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-46880
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-46880
Release Notes
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.4.2-relnotes.txt
Patch
https://ftp.openbsd.org/pub/OpenBSD/patches/7.0/common/006_x509.patch.sig
Patch
https://github.com/openbsd/src/commit/3f851282810fa0ab4b90b3b1ecec2e8717ef16f8
security.netapp.com
https://security.netapp.com/advisory/ntap-20230517-0006/
More from Libressl
9.8
CVE-2023-35784
A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata 026 and 7.3 before errata 004, and in LibreSSL before 3.6.3 and 3.7.x before 3.7.3
9.8
CVE-2015-5334
Off-by-one error in the OBJ_obj2txt function in LibreSSL before 2.3.1 allows remote attackers to cause a denial of service (program crash) or possible execute arbitrary code via a…
7.5
CVE-2015-5333
Memory leak in the OBJ_obj2txt function in LibreSSL before 2.3.1 allows remote attackers to cause a denial of service (memory consumption) via a large number of ASN.1 object…
7.4
CVE-2018-8970
The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes…
7.1
CVE-2019-25049
LibreSSL 2.9.1 through 3.2.1 has an out-of-bounds read in asn1_item_print_ctx (called from asn1_template_print_ctx)