High-risk vulnerabilities exposed by SSL 3.0
On April 9, October 15, 2014, Google researchers announced a very serious vulnerability in the SSL 3.0 protocol, which can be used by hackers to intercept encrypted data transmitted between browsers and servers, such as online banking accounts, email accounts, and personal privacy. The SSL 3.0 vulnerability allows attackers to initiate a downgrade attack, that is, spoofing the browser to say "the server does not support more secure transport layer (TL
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Google disclosed a security vulnerability in SSL 3.0 on Tuesday.
For more information, visit: https://www.openssl.org /~ Bodo/ssl-poodle.pdf
What isSSL3.0 poodleVulnerabilities?
The SSL protocol was developed by Netscape and V3.0 was released in 1996. SSL 3.0 has been in existence for 15 years. Currently, most browsers support this version. Generally, users' browsers use the new security protocol to connect to the server. To maintain compatibility, whe
SSLv3 poodle attack analysis
Attack Scenario:
(The attack scenario is harsh !)
For communication between A and C, attackers need to act as man-in-the-middle B, and B must be able to operate on a through JS scripts to send ssl3 requests (B can be a JS-based proxy request ), it can also steal the SSL ciphertext that a sends to C. Then, the encrypted cookie is restored through the CBC-mode padding Oracle attack.
Attack principle:
The CBC decryption pro
0x01 TLS in use for demotionLegacy servers, many TLS clients implement a downgrade dance:in a first handshake attempt, offer the highest Protocol version supported by the client? If this handshake fails, the retry (possibly repeatedly) with earlier protocol versions. Unlike proper protocol version negotiation (if the client offers TLS 1.2, the server may respond with, say, TLS 1.0), this Downgrade can also is triggered by the network glitches, or by active attackers. So if a attacker that contro
SSLv3 POODLE attack analysis, sslv3poodleSSLv3 POODLE attack analysisAttack Scenario:
(The attack scenario is harsh !)
For communication between A and C, attackers need to act as man-in-the-middle B, and B must be able to operate on A through JS scripts to send SSL3 requests (B can be A JS-based proxy request ), it can also steal the SSL ciphertext that A sends to C. Then, the encrypted cookie is restored
How to update a patch (Rolling Patch) in the Oracle RAC EnvironmentThe Oracle RAC database environment has many similarities and differences with the single-instance database environment. You can use opatch to update database patches. However, there are several different update Methods for the RAC environment patch update, and you can even implement rolling upgra
Label:Oracle database Common patch Set patch numbers and versions of PSU------------------------------------------------------------------------PATCHSET/PSU Patch Number Description11.2.0.4.0 13390677 11.2.0.4.0 PATCH SET for ORACLE DATABASE SERVER11.2.0.3.8 16902043 DATABASE PATCH
Oracle has released a large number of Patchset patch sets from 8i to 11gr2. Sometimes, when we want to download these patch sets from MyOracleSupport, we may not be able to find the patch number (patchidnumber) at once ), the following describes the Patchset and PSU PatchNumber indexes up to 11.2.0.3: PatchsetPSUPa
Oracle has released a large number of Patchset
One, CPU and PSURecently, after upgrading the database from 9.2.0.6 to 11.2.0.4, it was found that ORA-02072 error occurred when 11.2.0.4 accessed other 9i libraries via Dblink, and found a solution via Google, which was to upgrade to PSU 11.2.0.4.8, Note the procedure for installing patches, and it is recommended that you carefully read the relevant sections of the patch Readme document before patching, and that all the details of the
Linux patch tool patch AND diff
I. Tool Overview:
Diff patch Generation Tool
Diff can be followed by two file names or two directory names to generate Patches
Patch patching Tool
Patch purpose: generate the target file based on the original file and
Kernel Patch and patch installation-Linux general technology-Linux programming and kernel information. The following is a detailed description. The kernel patch is not required. It depends on what kind of linux kernel you choose, such as downloading the standard linux kernel and compiling the linux system to run on an x86 PC, there is no need for patches supporte
The patch command allows you to modify and update the original file by setting the patch file. If only one file is modified at a time, you can issue commands in the command column for sequential execution. If files are patched together, a large number of files can be repaired at a time, which is also one of the core upgrade methods for Linux systems.SyntaxPatch [-bceEflnNRstTuvZ] [-B Parameters:-B or -- bac
The patch patch command is usedHttp://www.cnblogs.com/huanghuang/archive/2011/07/14/2106402.htmlPatch commands are used for patching, and patch files are generated using diffPatch command syntaxPatch [-B [-B Prefix]] [-F] [-l] [-N] [-R] [-S] [-V] [-C |-e |-n] [-D Directory] [-D Define] [-F number] [-I. Patchfile] [-O OutFile] [-P number] [- R Rejectfile] [-X num
Transferred from: http://blog.csdn.net/dl0914791011/article/details/17299103Patches are generated by the Diff tool, and patch tools are patched.Before using diff, you need to keep an unmodified source code and then modify a copy of the source code elsewhere. Diff compares these two copies of source code to generate patches. The modified source code must retain the original file name, for example, if you modify the source of the A.C file, then, the mod
The patch is generated using the diff tool, and the patch tool is patched.
Before using diff, you need to keep a copy of the unmodified source code and modify the source code elsewhere. diff compares the two source codes to generate a patch. the modified source code must retain the original file name. For example, if you modify. c file. The modified file is stil
The installation problem of patch expect-5.38.0-spawn-43310.patch-Linux general technology-Linux technology and application information, the following is a detailed reading. Install a spawn patch for your documents. There is a question about the path to be entered during installation.
During installation, the following message is displayed:
[Root @ laserver fai
1) diff/patch: This is a mathematical tool. diff is used to evaluate the difference between two sets, and patch is the sum.
Diff a B> C: Generate diff files a and B c
Patch a C adds a diff file to get B
Patch-r B c B is restored to
2) kernel patch
Generate
Diff-unr lin
What is a monkey patch (Monkey Patch)? In dynamic languages, you append and change functionality without modifying the source code.
The purpose of using monkey patches:1. Additional function2. Function change3. Error correction procedure4, increase the hook, in the execution of a method while performing some other processing, such as printing logs, to achieve AOP, etc.5, the cache, in the calculation is ve
As famous as a blue screen is Windows endless patches, many patches are the key to be installed with the upgrade of Microsoft anti-piracy measures, the use of Windows Update on pirated systems is obviously not realistic, So we all use 360 security guards and so on software patching but the problem also comes, some patches are not able to hit, and even sometimes use the system with Automatic Updates will encounter can not install patches problem, how should we solve it?
First step: Encounter the
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