The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a database and tools to fix them.
History of vulnerabilities analyzed by Vigil@nce:

computer vulnerability bulletin CVE-2010-4656

Linux kernel: buffer overflow of USB IO-Warrior

Synthesis of the vulnerability

When an USB Code Mercenaries IO-Warrior is installed, a local attacker can generate a buffer overflow, in order to create a denial of service or possibly to execute code.
Severity: 1/4.
Creation date: 25/01/2011.
Identifiers: BID-46069, CERTA-2002-AVI-280, CVE-2010-4656, DSA-2153-1, openSUSE-SU-2011:0399-1, openSUSE-SU-2013:0927-1, RHSA-2011:0330-01, RHSA-2011:0421-01, SUSE-SA:2011:019, SUSE-SA:2011:020, VIGILANCE-VUL-10300.
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Description of the vulnerability

The USB Code Mercenaries IO-Warrior product is used to transmit parallel data via USB.

The file drivers/usb/misc/iowarrior.c implements the driver for IO-Warrior. However, this driver limits the number of report ports to 8. A local attacker can thus use more than 8 ports, in order to create an overflow.

When an USB Code Mercenaries IO-Warrior is installed, a local attacker can therefore generate a buffer overflow, in order to create a denial of service or possibly to execute code.
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vulnerability alert CVE-2010-4655

Linux kernel: memory reading via ethtool

Synthesis of the vulnerability

A local attacker, who has the CAP_NET_ADMIN capability, can use ethtool, in order to read fragments of kernel memory.
Severity: 1/4.
Creation date: 25/01/2011.
Identifiers: BID-45972, CVE-2010-4655, DSA-2264-1, ESX400-201110001, ESX400-201110401-SG, ESX400-201110403-SG, ESX400-201110406-SG, ESX400-201110408-SG, ESX400-201110409-SG, ESX400-201110410-SG, RHSA-2011:0263-01, RHSA-2011:0303-01, RHSA-2011:0330-01, RHSA-2011:0421-01, SUSE-SA:2011:015, SUSE-SU-2011:1150-1, VIGILANCE-VUL-10299, VMSA-2011-0004.2, VMSA-2011-0009.1, VMSA-2011-0010.2, VMSA-2011-0012, VMSA-2011-0012.1, VMSA-2011-0013, VMSA-2012-0005.
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Description of the vulnerability

The net/core/ethtool.c file implements features for Ethernet network devices.

The following functions return information on the device:
 - ethtool_get_rxfh_indir()
 - ethtool_get_rx_ntuple()
 - ethtool_get_regs()
In order to call them, the user has to have the CAP_NET_ADMIN capability.

However, these function do not initialize data structures returned to the user.

A local attacker, who has the CAP_NET_ADMIN capability, can therefore use ethtool, in order to read fragments of kernel memory.
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security vulnerability CVE-2011-0521

Linux kernel: memory corruption via av7110

Synthesis of the vulnerability

When a DVB device is installed, a local attacker can generate a memory corruption in the av7110 driver, in order to create a denial of service or to execute code.
Severity: 2/4.
Creation date: 25/01/2011.
Identifiers: BID-45986, CERTA-2002-AVI-280, CVE-2011-0521, DSA-2153-1, ESX400-201110001, ESX400-201110401-SG, ESX400-201110403-SG, ESX400-201110406-SG, ESX400-201110408-SG, ESX400-201110409-SG, ESX400-201110410-SG, FEDORA-2011-1138, openSUSE-SU-2011:0346-1, openSUSE-SU-2011:0399-1, openSUSE-SU-2011:0416-1, openSUSE-SU-2013:0927-1, RHSA-2011:0263-01, RHSA-2011:0330-01, RHSA-2011:0421-01, RHSA-2011:0429-01, SUSE-SA:2011:015, SUSE-SA:2011:017, SUSE-SA:2011:019, SUSE-SA:2011:020, SUSE-SA:2011:021, SUSE-SU-2011:0928-1, VIGILANCE-VUL-10298, VMSA-2011-0004.2, VMSA-2011-0009.1, VMSA-2011-0010.2, VMSA-2011-0012, VMSA-2011-0012.1, VMSA-2011-0013, VMSA-2012-0005.
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Description of the vulnerability

The DVB (Digital Video Broadcasting) protocols are used for digital video. The drivers/media/dvb/ttpci/av7110_ca.c driver supports DVB devices using the Texas Instruments AV7110 chip.

The dvb_ca_ioctl() function of the av7110_ca.c file processes ioctls. However, if its third parameter uses a negative integer, the memory is corrupted.

When a DVB device is installed, a local attacker can therefore generate a memory corruption in the av7110 driver, in order to create a denial of service or to execute code.
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threat alert CVE-2010-4657

PHP: memory reading via libxml2

Synthesis of the vulnerability

The PHP code does not check UTF-8 data transmitted to libxml2, so an attacker can read a fragment of the PHP process memory.
Severity: 1/4.
Creation date: 25/01/2011.
Identifiers: 52998, 631551, BID-45973, CVE-2010-4657, VIGILANCE-VUL-10297.
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Description of the vulnerability

The libxml2 library creates XML documents. For example, the xmlTextWriterPtr::xmlTextWriterWriteAttribute() method adds an attribute. Its parameters have to be valid UTF-8.

The XMLWriter::writeAttribute() method of the XML module of PHP calls libxml2. However, it does not validate UTF-8 data before transmitting them to libxml2.

UTF-8 sequences starting with the bits 1110xxxx are composed of 3 bytes. The "\xE0\x81" is thus invalid because the third byte is missing. However, libxml2 reads the third byte, which is the null ('\0') string ending character. The library thus does not detect the end of string and continues to read after it.

An attacker can therefore force the absorption of the null byte by XMLWriter::writeAttribute(), and then read the generated XML document, which will contain memory data located after the end of the malformed UTF-8 sequence transmitted to writeAttribute().

The PHP code thus does not check UTF-8 data transmitted to libxml2, so an attacker can read a fragment of the PHP process memory.
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weakness announce CVE-2011-0272

HP LoadRunner, Performance Center: code execution

Synthesis of the vulnerability

An attacker can generate a buffer overflow in the magentproc.exe process, in order to execute code with SYSTEM privileges.
Severity: 3/4.
Creation date: 25/01/2011.
Identifiers: BID-45792, c02680678, CERTA-2011-AVI-019, CVE-2011-0272, HPSBMA02624, SSRT100195, VIGILANCE-VUL-10296, ZDI-11-015.
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Description of the vulnerability

The HP LoadRunner and HP Performance Center products install the magentproc.exe process. It listens on ports 5001/tcp and 5002/tcp, when HttpTunnel is enabled.

However, the process does not check the allocation size requested by the client. A malicious client can thus request a short memory area, in order to create an overflow.

An attacker can therefore generate a buffer overflow in the magentproc.exe process, in order to execute code with SYSTEM privileges.
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cybersecurity weakness 10295

Windows Fax: double free of Cover Page Editor

Synthesis of the vulnerability

When Fax features are installed, an attacker can invite the victim to open a malicious COV file, in order to execute code on the computer.
Severity: 2/4.
Creation date: 24/01/2011.
Identifiers: 2527308, BID-45942, MS11-024, VIGILANCE-VUL-10295.
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Description of the vulnerability

The Fax Services, Fax Console and "Windows Fax and Scan" features send fax.

The Windows Fax Cover Page Editor (fxscover.exe) program creates fax cover pages, which are saved in files with the ".COV" extension.

A COV file contains object definitions, such as text areas. However, when the index of text zones is invalid, a double memory free occurs.

When Fax features are installed, an attacker can therefore invite the victim to open a malicious COV file, in order to execute code on the computer.
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computer threat alert CVE-2011-0902

Sun SunScreen: code execution

Synthesis of the vulnerability

When the SunScreen firewall is installed on Solaris 9, an attacker can generate a buffer overflow in the administration service, in order to execute code.
Severity: 3/4.
Creation date: 24/01/2011.
Identifiers: BID-45963, CVE-2011-0902, VIGILANCE-VUL-10293.
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Description of the vulnerability

The SunScreen Firewall product can be installed on Solaris 9. It is administered via the port 3853/tcp.

However, the administration service does not correctly check the size of received messages. An overflow thus occurs.

When the SunScreen firewall is installed on Solaris 9, an attacker can therefore generate a buffer overflow in the administration service, in order to execute code.
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cybersecurity bulletin CVE-2011-0008

Sudo: privilege elevation

Synthesis of the vulnerability

On Linux, and in a special Sudo configuration, a local attacker can execute commands as root.
Severity: 2/4.
Creation date: 24/01/2011.
Identifiers: CVE-2011-0008, FEDORA-2011-0455, FEDORA-2011-0470, MDVSA-2011:018, VIGILANCE-VUL-10292.
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Description of the vulnerability

The VIGILANCE-VUL-8443 vulnerability can be used by a local attacker, who is member of a privileged group, in order to execute a command with root rights. This vulnerability was corrected in 2009.

Some Linux distributions applied a patch on the source code of Sudo, which created a regression, so this vulnerability reappeared.

On Linux, and in a special Sudo configuration, a local attacker can therefore execute commands as root.
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security bulletin 10291

Perl Convert-UUlib: buffer overflow of UURepairData

Synthesis of the vulnerability

An attacker can use malformed encoded data, in order to generate a buffer overflow of one byte, leading to a denial of service and possibly to code execution.
Severity: 2/4.
Creation date: 21/01/2011.
Identifiers: FEDORA-2011-0052, FEDORA-2011-0062, VIGILANCE-VUL-10291.
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Description of the vulnerability

The Perl Convert::UUlib module encodes and decodes several formats: UUencode, Base64, Binhex, Quoted-Printable, etc.

The UURepairData function tries to repair malformed data. However, this function can write one byte past the end of the storage array.

An attacker can therefore use malformed data, in order to generate a buffer overflow of one byte, leading to a denial of service and possibly to code execution.
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computer vulnerability alert CVE-2010-4654

xpdf: memory corruption via Gfx

Synthesis of the vulnerability

An attacker can invite the victim to display a malicious PDF document with xpdf, in order to execute code on his computer.
Severity: 2/4.
Creation date: 21/01/2011.
Identifiers: BID-45948, CVE-2010-4654, VIGILANCE-VUL-10290.
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Description of the vulnerability

The xpdf program displays PDF or PostScript documents, which can contain TrueType character fonts.

A TrueType font is composed of shapes (lines and Bezier curves) and of a "program" which adapts these outlines on the display grid.

The Gfx() function of the poppler/Gfx.cc file displays characters. However, if the "program" uses too many instructions unstacking the stack, the memory is corrupted.

An attacker can therefore invite the victim to display a malicious PDF document with xpdf, in order to execute code on his computer.
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