CVE-2021-23840 Information
Share on:Description
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).
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Reference
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9b1129239f3ebb1d1c98ce9ed41d5c9476c47cb2 https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a51b9e1d0cf0bf8515f7201b68fb0a3482b3dc1 https://www.openssl.org/news/secadv/20210216.txt https://www.debian.org/security/2021/dsa-4855 https://security.netapp.com/advisory/ntap-20210219-0009/ https://www.tenable.com/security/tns-2021-03 https://security.gentoo.org/glsa/202103-03 https://www.tenable.com/security/tns-2021-09 https://www.tenable.com/security/tns-2021-10 https://www.oracle.com/security-alerts/cpuApr2021.html https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846 https://www.oracle.com//security-alerts/cpujul2021.html https://www.oracle.com/security-alerts/cpuoct2021.html https://kc.mcafee.com/corporate/index?page=content&id=SB10366 https://www.oracle.com/security-alerts/cpujan2022.html https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf https://www.oracle.com/security-alerts/cpuapr2022.html
Attack Complexity
LOW
Privileges Required
NONE
User Interaction Required
NONE
Scope
NONE
Confidentiality Impact
UNCHANGED
Integrity Impact
NONE
Availability Impact
NONE
Base Score
HIGH
Base Severity
7.5