Detections
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Alpine: libcrypto3, multiple openssl packages: security update to 1.1.1k-r0
high Tenable Cloud Security Plugin ID 424285
Description
There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:- An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a
client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was
present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL
pointer dereference will result, leading to a crash and a denial of service attack. A server is only
vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS
clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of
these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in
OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j). (CVE-2021-3449)
- The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a
certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow
certificates in the chain that have explicitly encoded elliptic curve parameters was added as an
additional strict check. An error in the implementation of this check meant that the result of a previous
check to confirm that certificates in the chain are valid CA certificates was overwritten. This
effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a
"purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a
valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where
a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A
purpose is set by default in libssl client and server certificate verification routines, but it can be
overridden or removed by an application. In order to be affected, an application must explicitly set the
X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification
or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions
1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k.
OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j).
(CVE-2021-3450)
See Also
Plugin Details
Severity: High
ID: 424285
Version: Revision 1.8
Type: Local
Published: 4/4/2025
Updated: 7/2/2026
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Medium
Score: 6.3
Percentile: 96.77
CVSS v2
Risk Factor: Medium
Base Score: 5.8
Temporal Score: 4.5
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2021-3450
CVSS v3
Risk Factor: High
Base Score: 7.4
Temporal Score: 6.7
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
Exploit Available: true
Exploit Ease: Exploits are available
Vulnerability Publication Date: 3/25/2021
Reference Information
CVE: CVE-2021-3449, CVE-2021-3450
IAVA: 2021-A-0149-S