https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=30919ab80a478f2d81f2e9acdcca3fa4740cd547

https://www.openssl.org/news/secadv/20210216.txt

https://security.netapp.com/advisory/ntap-20210219-0009/

https://www.oracle.com/security-alerts/cpuApr2021.html

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846

https://www.oracle.com/security-alerts/cpuoct2021.html

https://www.oracle.com/security-alerts/cpuapr2022.html

An update of the openssl package has been released.

The version of openssl installed on the remote host is prior to 1.0.2k-19. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2021-1608 advisory.

  - 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)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of tested product installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 1.0.2y advisory.

  - 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)

  - 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)

  - 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)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The OpenSSL project reports :

NULL pointer deref in X509_issuer_and_serial_hash() CVE-2021-23841(Moderate) 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.

Integer overflow in CipherUpdate CVE-2021-23840(Low) 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.

ID	Name	Product	Family	Severity
147005	Photon OS 1.0: Openssl PHSA-2021-1.0-0366	Nessus	PhotonOS Local Security Checks	low
146873	Photon OS 3.0: Openssl PHSA-2021-3.0-0200	Nessus	PhotonOS Local Security Checks	low
146628	Amazon Linux 2 : openssl (ALAS-2021-1608)	Nessus	Amazon Linux Local Security Checks	low
146591	OpenSSL 1.0.2 < 1.0.2y Multiple Vulnerabilities	Nessus	Web Servers	low
146560	FreeBSD : OpenSSL -- Multiple vulnerabilities (96a21236-707b-11eb-96d8-d4c9ef517024)	Nessus	FreeBSD Local Security Checks	low

CVE-2021-23839

low

Tenable Plugins

low

low

low

low

low