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# CVE-2021-23840 | ||
# 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). | ||
# | ||
# We've determined that we are not impacted by this vulnerability because: | ||
# - we do not directly make any calls to the affected methods | ||
# | ||
# Performed by @daneleblanc, approved by @andytinkham | ||
CVE-2021-23840 | ||
|
||
# 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). | ||
# | ||
# We've determined that we are not impacted by this vulnerability because: | ||
# - we do not directly make any calls to the affected methods | ||
# | ||
# Performed by @daneleblanc, approved by @andytinkham | ||
CVE-2021-23841 |