Scientific Linux Security Update : wpa_supplicant on SL6.x i386/x86_64 (20150722)

An integer underflow flaw, leading to a buffer over-read, was found in the way wpasupplicant handled WMM Action frames. A specially crafted frame could possibly allow an attacker within Wi-Fi radio range to cause wpasupplicant to crash. CVE-2015-4142 This update includes the following enhancement...

RHEL 6 : wpa_supplicant (RHSA-2015:1439)

An updated wpasupplicant package that fixes one security issue and adds one enhancement is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having Low security impact. A Common Vulnerability Scoring System CVSS base score, which gives a detailed...

lib32-openssl: man-in-the-middle

During certificate verification, OpenSSL will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain checks on untrusted certificates to be bypassed, such as the ...

OpenSSL 1.0.2c Alternative chains certificate forgery Vulnerability

Exploit for multiple platform in category remote exploits The function X509verifycert checks the value of |ctx-chain| at the beginning, and if it is NULL then it initialises it, along with the value of ctx-untrusted. The normal way to use X509verifycert is to first call X509STORECTXinit; then set...

Updated openssl package fixes security vulnerability

During certificate verification, OpenSSL starting from version 1.0.1n and 1.0.2b will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain checks on untrusted...

OpenSSL: Alternate chains certificate forgery

Background OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer SSL v2/v3 and Transport Layer Security TLS v1 as well as a general purpose cryptography library. Description During certificate verification, OpenSSL attempts to find an alternative certificate chain if the first...

openssl: man-in-the-middle

During certificate verification, OpenSSL will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain checks on untrusted certificates to be bypassed, such as the ...

CVE-2015-1793

The X509verifycert function in crypto/x509/x509vfy.c in OpenSSL 1.0.1n, 1.0.1o, 1.0.2b, and 1.0.2c does not properly process X.509 Basic Constraints cA values during identification of alternative certificate chains, which allows remote attackers to spoof a Certification Authority role and trigger...

Critical: openssl

Issue Overview: During certificate verfification, OpenSSL starting from version 1.0.1n and 1.0.2b will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain chec...

Vulnerability in OpenSSL - Alternative chains certificate forgery

An error in the implementation of the alternative certificate chain logic could allow an attacker to cause certain checks on untrusted certificates to be bypassed, such as the CA flag, enabling them to use a valid leaf certificate to act as a CA and “issue” an invalid certificate. Found by Adam...

openssl -- alternate chains certificate forgery vulnerability

OpenSSL reports: During certificate verification, OpenSSL starting from version 1.0.1n and 1.0.2b will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain chec...

OpenSSL Heartbleed 漏洞 (心脏出血)

OpenSSL“心脏出血”漏洞是一个非常严重的问题。这个漏洞使攻击者能够从内存中读取多达64 KB的数据。一些安全研究员表示：无需任何特权信息或身份验证，我们就可以从我们自己的（测试机上）偷来X.509证书的私钥、用户名与密码、聊天工具的消息、电子邮件以及重要的商业文档和通信等数据。这一切是如何发生的呢？让我们一起从代码中一探究竟吧。0x01 Bug请看ssl/dlboth.c，漏洞的补丁从这行语句开始：int dtls1processheartbeatSSL s unsigned char p = &s-s3-rrec.data0, pl; unsigned short hbtype;...

[SECURITY] Fedora 20 Update: mksh-50f-1.fc20

mksh is the MirBSD enhanced version of the Public Domain Korn shell pdksh, a bourne-compatible shell which is largely similar to the original AT&T Korn shell. It includes bug fixes and feature improvements in order to produce a modern, robust shell good for interactive and especially script use,...

[SECURITY] Fedora 22 Update: mksh-50f-1.fc22

mksh is the MirBSD enhanced version of the Public Domain Korn shell pdksh, a bourne-compatible shell which is largely similar to the original AT&T Korn shell. It includes bug fixes and feature improvements in order to produce a modern, robust shell good for interactive and especially script use,...

async-http-client: missing hostname verification for SSL certificates

It was found that async-http-client did not verify that the server hostname matched the domain name in the subject's Common Name CN or subjectAltName field in X.509 certificates. This could allow a man-in-the-middle attacker to spoof an SSL server if they had a certificate that was valid for any...

Design/Logic Flaw

The HTTP Alternative Services feature in Mozilla Firefox before 37.0.1 allows man-in-the-middle attackers to bypass an intended X.509 certificate-verification step for an SSL server by specifying that server in the uri-host field of an Alt-Svc HTTP/2 response header...

CVE-2015-0799

The HTTP Alternative Services feature in Mozilla Firefox before 37.0.1 allows man-in-the-middle attackers to bypass an intended X.509 certificate-verification step for an SSL server by specifying that server in the uri-host field of an Alt-Svc HTTP/2 response header...

CVE-2015-0799

Summary: Mozilla Firefox before 37.0.1 is affected by CVE-2015-0799 due to the HTTP Alt-Svc feature, which allows a man‑in‑the‑middle attacker to bypass X.509 certificate verification by directing the client to a chosen server via the uri-host in an Alt-Svc header. Impact: potential MITM disclosu...

Ubuntu 14.04 LTS : Firefox vulnerability (USN-2557-1)

The remote Ubuntu 14.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-2557-1 advisory. Muneaki Nishimura discovered a flaw in Mozilla's HTTP Alternative Services implementation which meant SSL certificate verification could be bypassed in some...

Vulnerability Forces Mozilla to Disable Opportunistic Encryption in Firefox

Less than a week after introducing the new opportunistic encryption feature in Firefox, Mozilla has had to disable it because of a security vulnerability in the browser’s implementation of the HTTP Alternative Services specification. The bug puts a kink in the new feature, which was designed to...