glibc, nscd security update

CentOS Errata and Security Advisory CESA-2017:1481 An update for glibc is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity...

[SECURITY] Fedora 24 Update: oniguruma-5.9.6-4.fc24

Oniguruma is a regular expressions library. The characteristics of this library is that different character encoding for every regular expression object can be specified. supported APIs: GNU regex, POSIX and Oniguruma native...

[SECURITY] Fedora 26 Update: oniguruma-6.3.0-1.fc26

Oniguruma is a regular expressions library. The characteristics of this library is that different character encoding for every regular expression object can be specified. supported APIs: GNU regex, POSIX and Oniguruma native...

Pwntools - CTF Framework And Exploit Development Library

pwntools is a CTF framework and exploit development library. Written in Python, it is designed for rapid prototyping and development, and intended to make exploit writing as simple as possible. from pwn import contextarch = 'i386', os = 'linux' r = remote'exploitme.example.com', 31337 EXPLOIT COD...

[SECURITY] Fedora 24 Update: pcre-8.40-7.fc24

PCRE, Perl-compatible regular expression, library has its own native API, b ut a set of wrapper functions that are based on the POSIX API are also supplied in the libpcreposix library. Note that this just provides a POSIX calling interface to PCRE: the regular expressions themselves still follow...

Metasploit Weekly Wrapup

Ghost...what??? hdm recently provided a new exploit module for a type confusion vulnerability that exists in Ghostscript versions 9.21 and earlier, allowing remote code execution on the target. And to "kick it up a notch", this exploit got itself a snazzy logo which also contains the exploit:...

[SECURITY] Fedora 26 Update: pcre-8.40-7.fc26

PCRE, Perl-compatible regular expression, library has its own native API, b ut a set of wrapper functions that are based on the POSIX API are also supplied in the libpcreposix library. Note that this just provides a POSIX calling interface to PCRE: the regular expressions themselves still follow...

[SECURITY] Fedora 24 Update: pcre2-10.21-18.fc24

PCRE2 is a re-working of the original PCRE Perl-compatible regular expression library to provide an entirely new API. PCRE2 is written in C, and it has its own API. There are three sets of functions, one for the 8-bit library, which processes strings of bytes, one for the 16-bit library, which...

[SECURITY] Fedora 25 Update: pcre-8.40-7.fc25

PCRE, Perl-compatible regular expression, library has its own native API, b ut a set of wrapper functions that are based on the POSIX API are also supplied in the libpcreposix library. Note that this just provides a POSIX calling interface to PCRE: the regular expressions themselves still follow...

[SECURITY] Fedora 25 Update: pcre2-10.23-6.fc25

PCRE2 is a re-working of the original PCRE Perl-compatible regular expression library to provide an entirely new API. PCRE2 is written in C, and it has its own API. There are three sets of functions, one for the 8-bit library, which processes strings of bytes, one for the 16-bit library, which...

[SECURITY] Fedora 26 Update: pcre2-10.23-6.fc26

PCRE2 is a re-working of the original PCRE Perl-compatible regular expression library to provide an entirely new API. PCRE2 is written in C, and it has its own API. There are three sets of functions, one for the 8-bit library, which processes strings of bytes, one for the 16-bit library, which...

NTP Privilege Escalation

Source: http://www.halfdog.net/Security/2015/NtpCronjobUserNtpToRootPrivilegeEscalation/ Introduction Problem description: The cronjob script bundled with ntp package is intended to perform cleanup on statistics files produced by NTP daemon running with statistics enabled. The script is run as ro...

Ubuntu 14.04/15.10 - User Namespace Overlayfs Xattr Setgid Privilege Escalation Vulnerability

Exploit for linux platform in category local exploits Source: http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ Introduction Problem description: Linux user namespace allows to mount file systems as normal user, including the overlayfs. As many of those...

Ubuntu 15.10 AUFS - allow_userns Fuse/Xattr User Namespaces Privilege Escalation Vulnerability

Exploit for linux platform in category local exploits Source: http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ Introduction Problem description: Aufs is a union filesystem to mix content of different underlying filesystems, e.g. read-only medium with r/w RAM-fs. That ...

kernel: Setting a POSIX ACL via setxattr doesn't clear the setgid bit

It was found that when file permissions were modified via chmod and the user modifying them was not in the owning group or capable of CAPFSETID, the setgid bit would be cleared. Setting a POSIX ACL via setxattr sets the file permissions as well as the new ACL, but doesn't clear the setgid bit in ...

kernel: S_ISGD is not cleared when setting posix ACLs in tmpfs (CVE-2016-7097 incomplete fix)

A vulnerability was found in the Linux kernel in 'tmpfs' file system. When file permissions are modified via 'chmod' and the user is not in the owning group or capable of CAPFSETID, the setgid bit is cleared in inodechangeok. Setting a POSIX ACL via 'setxattr' sets the file permissions as well as...

Amazon Linux AMI : kernel (ALAS-2017-805)

A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol DCCP implementation freed SKB socket buffer resources for a DCCPPKTREQUEST packet when the IPV6RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the...

Debian DSA-3791-1 : linux - security update

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or have other impacts. - CVE-2016-6786 / CVE-2016-6787 It was discovered that the performance events subsystem does not properly manage locks during certain migrations,...

[SECURITY] Fedora 24 Update: pcre-8.40-2.fc24

PCRE, Perl-compatible regular expression, library has its own native API, b ut a set of wrapper functions that are based on the POSIX API are also supplied in the libpcreposix library. Note that this just provides a POSIX calling interface to PCRE: the regular expressions themselves still follow...

UBUNTU-CVE-2017-5551

The simplesetacl function in fs/posixacl.c in the Linux kernel before 4.9.6 preserves the setgid bit during a setxattr call involving a tmpfs filesystem, which allows local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions. NOT...