Ubuntu Security Notice 1357-1 - It was discovered that the elliptic curve cryptography (ECC) subsystem in OpenSSL, when using the Elliptic Curve Digital Signature Algorithm (ECDSA) for the ECDHE_ECDSA cipher suite, did not properly implement curves over binary fields. This could allow an attacker to determine private keys via a timing attack. This issue only affected Ubuntu 8.04 LTS, Ubuntu 10.04 LTS, Ubuntu 10.10 and Ubuntu 11.04. Adam Langley discovered that the ephemeral Elliptic Curve Diffie-Hellman (ECDH) functionality in OpenSSL did not ensure thread safety while processing handshake messages from clients. This could allow a remote attacker to cause a denial of service via out-of-order messages that violate the TLS protocol. This issue only affected Ubuntu 8.04 LTS, Ubuntu 10.04 LTS, Ubuntu 10.10 and Ubuntu 11.04. Various other issues were also addressed.
35a63a05c4a33b71a7bcfee436327107866cecc57861e8d07b69574145af5179Debian Linux Security Advisory 2390-1 - Several vulnerabilities were discovered in OpenSSL, an implementation of TLS and related protocols. The DTLS implementation performs a MAC check only if certain padding is valid, which makes it easier for remote attackers to recover plaintext via a padding oracle attack. A double free vulnerability when X509_V_FLAG_POLICY_CHECK is enabled, allows remote attackers to cause applications crashes and potentially allow execution of arbitrary code by triggering failure of a policy check. On 32-bit systems, the operations on NIST elliptic curves P-256 and P-384 are not correctly implemented, potentially leaking the private ECC key of a TLS server. (Regular RSA-based keys are not affected by this vulnerability.) Various other issues were also addressed.
1bd9dd54ebd2b8dd8949d61a5c6e4677ff00eb13c0570952b6ac1337b614615a
© 2022 Packet Storm. All rights reserved.
%7Cutmcsr%3D(direct)%7Cutmcmd%3D(none)){kind=small}
Follow us on Twitter
Follow us on Facebook
Subscribe to an RSS Feed