Multiple vulnerabilities in libxml2

Published: 2017-12-13 00:00:00
Severity Low
Patch available YES
Number of vulnerabilities 5
CVE ID CVE-2017-9047
CVE-2017-9049
CVE-2017-9050
CVE-2017-8872
CVE-2017-9048
CVSSv3 4.8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
4.8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
4.8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
3.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
4.8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
CWE ID CWE-119
CWE-126
CWE-121
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Public exploit code for vulnerability #2 is available.
Public exploit code for vulnerability #3 is available.
Public exploit code for vulnerability #4 is available.
Public exploit code for vulnerability #5 is available.
Vulnerable software Libxml2
Vulnerable software versions Libxml2 2.9.4
Vendor URL xmlsoft.org

Security Advisory

1) Memory corruption

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the xmlSnprintfElementContent function of XMLSoft libxml2 due to improper memory handling by the valid.c source code. A remote attacker can send a specially crafted XML file, trigger memory corruption and cause the service to crash.

Successful exploitation of the vulnerability results in denial of service.

Remediation

Install update from vendor's website.

External links

http://www.vuxml.org/freebsd/76e59f55-4f7a-4887-bcb0-11604004163a.html

2) Heap-based buffer over-read

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the xmlDictComputeFastKey function of XMLSoft libxml2 due to improper bounds checking in the dict.c code. A remote attacker can send a specially crafted request, trigger heap-based buffer over-read condition and cause the service to crash.

Successful exploitation of the vulnerability results in denial of service.

Remediation

Install update from vendor's website.

External links

http://www.vuxml.org/freebsd/76e59f55-4f7a-4887-bcb0-11604004163a.html

3) Heap-based buffer over-read

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the xmlDictAddString function of XMLSoft libxml2 due to improper bounds checking in the dict.c code. A remote attacker can send a specially crafted request, trigger heap-based buffer over-read condition and cause the service to crash.

Successful exploitation of the vulnerability results in denial of service.

Remediation

Install update from vendor's website.

External links

http://www.vuxml.org/freebsd/76e59f55-4f7a-4887-bcb0-11604004163a.html

4) Buffer over-read

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The weakness exists in the htmlParseTryOrFinish function of XMLSoft libxml2 due to buffer over-read condition in the HTMLparser.c source code. A remote attacker can send a specially crafted XML file, trick the victim into opening it and read arbitrary data or cause the service to crash.

Successful exploitation of the vulnerability results in denial of service.

Remediation

Install update from vendor's website.

External links

http://www.vuxml.org/freebsd/76e59f55-4f7a-4887-bcb0-11604004163a.html

5) Stack-based buffer overflow

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the xmlSnprintfElementContent function of XMLSoft libxml2 due to improper bounds checking in the valid.c code. A remote attacker can send a specially crafted request, trigger stack-based buffer overflow condition and cause the service to crash.

Successful exploitation of the vulnerability results in denial of service.

Remediation

Install update from vendor's website.

External links

http://www.vuxml.org/freebsd/76e59f55-4f7a-4887-bcb0-11604004163a.html

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