The Raccoon attack exploits a flaw in the TLS specification which can lead
to an attacker being able to compute the pre-master secret in connections
which have used a Diffie-Hellman (DH) based ciphersuite. In such a case this
would result in the attacker being able to eavesdrop on all encrypted
communications sent over that TLS connection. The attack can only be exploited
if an implementation re-uses a DH secret across multiple TLS connections.
Note that this issue only impacts DH ciphersuites and not ECDH ciphersuites.
(CVE-2020-1968)
The X.509 GeneralName type is a generic type for representing different types
of names. One of those name types is known as EDIPartyName.
OpenSSL provides a function GENERAL_NAME_cmp which compares different
instances of a GENERAL_NAME to see if they are equal or not. This function
behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME.
A NULL pointer dereference and a crash may occur leading to a possible
denial of service attack. OpenSS...
- https://bugs.mageia.org/show_bug.cgi?id=27305
- https://openssl-library.org/news/secadv/20200909.txt
- https://ubuntu.com/security/notices/USN-4504-1
- https://openssl-library.org/news/secadv/20201208.txt
- https://lists.debian.org/debian-security-announce/2020/msg00214.html
- https://ubuntu.com/security/notices/USN-4662-1
- https://www.cve.org/CVERecord?id=CVE-2020-1968
- https://www.cve.org/CVERecord?id=CVE-2020-1971
- 7/core/compat-openssl10-1.0.2u-1.1.mga7
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