Signed/unsigned conversion bug in OpenBSD select() call

By passing negative argument to select function it's possible to overwrite the fragment of kernel memory...

OpenBSD Security Advisory: Select Boundary Condition

OpenBSD Security Advisory adv.select Original Release Date: 2002-08-11 1. Systems affected: All versions of OpenBSD. 2. Overview: Insufficient boundary checks in the select call allow an attacker to overwrite kernel memory and execute arbitrary code in kernel context. Traditionally, the size...

CVE-2002-0514

PF in OpenBSD 3.0 with the return-rst rule sets the TTL to 128 in the RST packet, which allows remote attackers to determine if a port is being filtered because the TTL is different than the default TTL...

CVE-2002-0766

OpenBSD 2.9 through 3.1 allows local users to cause a denial of service resource exhaustion and gain root privileges by filling the kernel's file descriptor table and closing file descriptors 0, 1, or 2 before executing a privileged process, which is not properly handled when OpenBSD fails to ope...

FreeBSD 4.x / NetBSD 1.4.x/1.5.x/1.6 / OpenBSD 3 - pppd Arbitrary File Permission Modification Race Condition

source: https://www.securityfocus.com/bid/5355/info A vulnerability has been reported in some versions of the pppd daemon included with multiple BSD distributions. A race condition error in the code may result in the pppd process changing the file permissions on an arbitrary system file. pppd wil...

FreeBSD 4.x NetBSD 1.4.x1.5.x1.6 OpenBSD 3 - pppd Arbitrary File Permission Modification Race Condition

FreeBSD 4.x NetBSD 1.4.x1.5.x1.6 OpenBSD 3 - pppd Arbitrary File Permission Modification Race Condition source: https://www.securityfocus.com/bid/5355/info A vulnerability has been reported in some versions of the pppd daemon included with multiple BSD distributions. A race condition error in the...

CVE-2002-0542

mail in OpenBSD 2.9 and 3.0 processes a tilde escape character in a message even when it is not in interactive mode, which could allow local users to gain root privileges via calls to mail in cron...

CVE-2002-0557

Vulnerability in OpenBSD 3.0, when using YP with netgroups in the password database, causes 1 rexec or 2 rsh to run another user's shell, or 3 atrun to change to a different user's directory, possibly due to memory allocation failures or an incorrect call to authapproval...

OpenBSD 3.1 sshd remote root exploit

Download openssh-3.2.2p1.tar.gz and untar it $ tar -xvzf openssh-3.2.2p1.tar.gz 2. Apply the patch provided below by running: /openssh-3.2.2p1 $ patch pathtodifffile 3. Compile the patched client /openssh-3.2.2p1 $ ./configure && make ssh 4. Run the evil ssh: /openssh-3.2.2p1 $ ./ssh...

Remote buffer overflow in resolver code of libc

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ----------------------------------------------------------------------------- Pine Internet Security Advisory ----------------------------------------------------------------------------- Advisory ID : PINE-CERT-20020601 Authors : Joost Pol...

Re: Another flaw in Apache?

Further investigation show that the flaw is not in Apache itself, but in modssl, so it's probably not an OpenBSD-specific bug. It's just not triggered on systems where modssl isn't compiled in. The overflow is the sslcompatdirective function in src/modules/ssl/sslenginecompat.c . -- /- Frank DENI...

Another flaw in Apache?

Hello. While playing with the SetEnv directive with Apache, I noticed that httpd processes are dying with a signal 11 if the data stored in an environment variable was too long. I simply triggered the bug by creating a .htaccess file so a regular user can do it with : SetEnv DATELOCALE "..." The...

Apache 1.x2.0.x - Chunked-Encoding Memory Corruption (1)

Apache 1.x2.0.x - Chunked-Encoding Memory Corruption 1 // source: https://www.securityfocus.com/bid/5033/info When processing requests coded with the 'Chunked Encoding' mechanism, Apache fails to properly calculate required buffer sizes. This is believed to be due to improper signed interpretatio...

CVE-2002-0557

OpenBSD 3.0 vulnerability when using NIS/YP with netgroups in the password database can allow rexec or rsh to run another user’s shell, or atrun to switch to a different user’s directory, possibly due to memory allocation failures or an incorrect call to auth_approval(). No remediation details ar...

CVE-2002-0514

OpenBSD 3.0 PF with the return-rst rule is vulnerable. The RST packet’s TTL is set to 128, allowing remote attackers to infer whether a port is filtered by comparing TTL to the default. Affected component: PF rule handling in OpenBSD 3.0. Root cause: TTL manipulation in RST responses leads to dis...

CVE-2002-0514

PF in OpenBSD 3.0 with the return-rst rule sets the TTL to 128 in the RST packet, which allows remote attackers to determine if a port is being filtered because the TTL is different than the default TTL...

CVE-2002-0557

Vulnerability in OpenBSD 3.0, when using YP with netgroups in the password database, causes 1 rexec or 2 rsh to run another user's shell, or 3 atrun to change to a different user's directory, possibly due to memory allocation failures or an incorrect call to authapproval...

PT-2002-1565 · Openbsd · Openbsd

Name of the Vulnerable Software and Affected Versions: OpenBSD version 3.0 Description: The issue allows remote attackers to determine if a port is being filtered due to the TTL being different from the default TTL in the RST packet. This occurs because the PF in OpenBSD 3.0 with the return-rst...

OpenBSD kernel fails to properly check closed file descriptors "0-2" when running setuid program

Overview The OpenBSD kernel does not adequately check file descriptors 0-2 prior to execing setuid binaries. Other OS kernels may be vulnerable as well. Description The OpenBSD kernel does not adequately check file descriptors 0-2 prior to execing setuid binaries. As a result, an attacker may be...

psyBNC 2.3 - Denial of Service

/ psyBNC include include include include include include include include include define SIZE 9000 define PORT 31337 define USER "pr0ix" int senddosint port, int size, char target, char user; int checkvuln...