similar to: denial of service attack on login

There are conflicting reports about wether or not Red Hat 4.0 is vulnerable to the login-lockout described earlier. I have the impression that if you install the updates it will have been fixed. Approval of messages about this subject is now restricted to "here is a patch", and a vendors "We have made a patch available". Roger.

In Debian 1.1, the optional DOSEMU package installs /usr/sbin/dos setuid root. This is a serious security hole which can be exploited to gain access to any file on the system. Package: dosemu Version: 0.64.0.2-9 ------- start of cut text -------------- $ cat /etc/debian_version 1.1 $ id uid=xxxx(quinlan) gid=xxxx(quinlan) groups=xxxx(quinlan),20(dialout),24(cdrom) [quinlan:~]$ ls -al

Hi, I''ve been thinking about group membership and the corresponding (weak) restrictions to system resources. Consider the following: % cat > gsh.c main() { system("/bin/sh"); } % cc -o gsh gsh.c % id uid=100(joe) gid=500(users) groups=14(floppy),15(sound) % chgrp sound gsh % chmod g+s gsh % mail abuser Subject: You owe me $5...

--------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: Denial of service attack in syslogd Advisory ID: RHSA-1999:055-01 Issue date: 1999-11-19 Updated on: 1999-11-19 Keywords: syslogd sysklogd stream socket Cross references: bugtraq id #809 --------------------------------------------------------------------- 1. Topic: A

On 9/20/19 8:58 AM, Eric Blake wrote: > On 9/12/19 12:41 PM, Richard W.M. Jones wrote: >> We have discovered a potential Denial of Service / Amplification Attack >> in nbdkit. > > Unfortunately, our fix for this issue cause another potential Denial of > Service attack: > >> >> Lifecycle >> --------- >> >> Reported: 2019-09-11 Fixed:

--------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: Denial of service attack in in.telnetd Advisory ID: RHSA-1999:029-01 Issue date: 1999-08-19 Updated on: Keywords: telnet telnetd Cross references: --------------------------------------------------------------------- 1. Topic: A denial of service attack has been fixed in

[Sorry, it seems that I overlooked this message -- alex] Hi, Since nvi is hard to come by, here is a little program to mimic the behavior of nvi on any file you care to try... usage: locklogin file_to_lock It first tries POSIX locking and then does BSD flavor. It seems that it is BSD after all that is causing the trouble... Best wishes Andrew #!/bin/csh -f # Uuencoded gz-compressed file

We have discovered a potential Denial of Service / Amplification Attack in nbdkit. Lifecycle --------- Reported: 2019-09-11 Fixed: 2019-09-11 Published: 2019-09-12 There is no CVE number assigned for this issue yet, but the bug is being categorized and processed by Red Hat's security team which may result in a CVE being published later. Credit ------ Reported and patched by Richard W.M.

There's a denial of service attack possible from guests on any program that does inspection (eg. virt-inspector, many other virt-* tools, virt-v2v, OpenStack). The attack causes the host process to crash because of a double free. It's probably not exploitable (definitely not on Fedora because of the default memory hardening settings). This patch contains the fix and a reproducer:

On Tue, May 28, Richard W.M. Jones wrote: > > There's a denial of service attack possible from guests on any program > that does inspection (eg. virt-inspector, many other virt-* tools, > virt-v2v, OpenStack). > > The attack causes the host process to crash because of a double free. > It's probably not exploitable (definitely not on Fedora because of the >

I am trying to use shfs to mount a remote root filesystem for a diskless workstation. The system downloads its kernel and initrd from a server. I have tried repeatedly to get a working installation of ssh on the initrd with no success. I finally got ssh to connect to the server. Normally when I use ssh the session goes as follows [arrummzen at localhost LFS-BOOK-6.0-HTML]$ ssh 192.168.11.10 -l

Bill Moran wrote: > This report seems pretty vague. I'm unsure as to whether the alleged > "bug" gives the user any more permissions than he'd already have? Anyone > know any details? This is a local denial of service bug, which was fixed 6 weeks ago in HEAD and RELENG_6. There is no opportunity for either remote denial of service or any privilege escalation. >

On Fri, May 31, 2013 at 01:03:24AM +0200, Olaf Hering wrote: > #2 0x00007ffff7b7936c in guestfs___safe_strdup (g=0x65da50, str=0x0) at alloc.c:96 > #3 0x00007ffff7b8b65e in parse_suse_release (filename=<optimized out>, fs=<optimized out>, g=<optimized out>) at inspect-fs-unix.c:343 This is a different problem: lines = guestfs_head_n (g, 10, filename); if (lines ==

This should fix it I think. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/

This issue has been assigned CVE-2013-2124. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 80 OCaml packages (the OPEN alternative to F#)

TITLE: KAME Project "ipcomp6_input()" Denial of Service CRITICAL: Moderately critical IMPACT: DoS WHERE: >From remote DESCRIPTION: A vulnerability has been reported in the KAME Project, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerability is caused due to an error within the "ipcomp6_input()" function in

On 9/12/19 12:41 PM, Richard W.M. Jones wrote: > We have discovered a potential Denial of Service / Amplification Attack > in nbdkit. Unfortunately, our fix for this issue cause another potential Denial of Service attack: > > Lifecycle > --------- > > Reported: 2019-09-11 Fixed: 2019-09-11 Published: 2019-09-12 > > There is no CVE number assigned for this issue

Subject: logcheck-database: Tweak to ssh rules to ignore AllowGroups denial Package: logcheck-database Version: 1.3.13 Severity: minor *** Please type your report below this line *** Similar to how AllowUsers denials are ignored, also ignore AllowGroups: ^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ sshd\[[[:digit:]]+\]: User [-_.[:alnum:]]+ from [-_.[:alnum:]]+ not allowed because none of

Hi All! Some time ago, we received e-mail message, which makes our server CPU exhaustion attack. --- PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 26319 5751796 20 0 2868 1868 1484 R 99.2 0.1 22:04.77 imap --- It happens when I try open mail folder with this buggy message. Our setup: -- slackware 11.0, x86_32 -- linux 2.6.31.6 -- dovecot 1.2.10 -- mailbox(not

Package: xen-3 Version: 3.1.0-1 Severity: grave Tags: security patch Hi, the following CVE (Common Vulnerabilities & Exposures) id was published for xen-3. CVE-2007-5907[0]: | Xen 3.1.1 does not prevent modification of the CR4 TSC from | applications, which allows pv guests to cause a denial of service | (crash). CVE-2007-5906[1]: | Xen 3.1.1 allows virtual guest system users to cause a |