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).
CVE-2021-23840
CVSS Score: 7.5 (HIGH)
EPSS Score: 0.85%
Risk Score: 5.25 (HIGH)
Risk Score dựa trên điểm CVSS và EPSS. Điểm này chỉ mang tính chất tham khảo và không được công nhận quốc tế.


Mitre ATT&CK Technical v15.1
T1053.002 – At
Liên kết tham khảo
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://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
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=6a51b9e1d0cf0bf8515f7201b68fb0a3482b3dc1
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=9b1129239f3ebb1d1c98ce9ed41d5c9476c47cb2
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://security.netapp.com/advisory/ntap-20240621-0006/
Vendor - Produce - Version
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