Alpine: libcrypto3, multiple openssl packages: security update to 1.1.1-r0 (deprecated)

low Tenable Cloud Security Plugin ID 400281

Description

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

- OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to
support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack
when unpadding an RSA signature. Clients that support SSL or TLS versions greater than SSLv2 are supposed
to use a special form of padding. A server that supports greater than SSLv2 is supposed to reject
connection attempts from a client where this special form of padding is present, because this indicates
that a version rollback has occurred (i.e. both client and server support greater than SSLv2, and yet this
is the version that is being requested). The implementation of this padding check inverted the logic so
that the connection attempt is accepted if the padding is present, and rejected if it is absent. This
means that such as server will accept a connection if a version rollback attack has occurred. Further the
server will erroneously reject a connection if a normal SSLv2 connection attempt is made. Only OpenSSL
1.0.2 servers from version 1.0.2s to 1.0.2x are affected by this issue. In order to be vulnerable a 1.0.2
server must: 1) have configured SSLv2 support at compile time (this is off by default), 2) have configured
SSLv2 support at runtime (this is off by default), 3) have configured SSLv2 ciphersuites (these are not in
the default ciphersuite list) OpenSSL 1.1.1 does not have SSLv2 support and therefore is not vulnerable to
this issue. The underlying error is in the implementation of the RSA_padding_check_SSLv23() function. This
also affects the RSA_SSLV23_PADDING padding mode used by various other functions. Although 1.1.1 does not
support SSLv2 the RSA_padding_check_SSLv23() function still exists, as does the RSA_SSLV23_PADDING padding
mode. Applications that directly call that function or use that padding mode will encounter this issue.
However since there is no support for the SSLv2 protocol in 1.1.1 this is considered a bug and not a
security issue in that version. OpenSSL 1.0.2 is out of support and no longer receiving public updates.
Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j.
Fixed in OpenSSL 1.0.2y (Affected 1.0.2s-1.0.2x). (CVE-2021-23839)

- Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument
in some cases where the input length is close to the maximum permissable length for an integer on the
platform. In such cases the return value from the function call will be 1 (indicating success), but the
output length value will be negative. This could cause applications to behave incorrectly or crash.
OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to
OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out
of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should
upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i).
Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x). (CVE-2021-23840)

- The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based
on the issuer and serial number data contained within an X509 certificate. However it fails to correctly
handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is
maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a
potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by
OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on
certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are
affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x
and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving
public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should
upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected
1.0.2-1.0.2x). (CVE-2021-23841)

Plugin Details

Severity: Low

ID: 400281

Version: Revision 1.32

Type: Local

Family: Alpine Linux Local Security Checks

Published: 8/16/2023

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.69

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.6

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2021-23839

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.5

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/16/2021

Vulnerability Publication Date: 2/16/2021

Reference Information

CVE: CVE-2021-23839, CVE-2021-23840, CVE-2021-23841

IAVA: 2021-A-0103-S

Detections

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