Heap-based buffer over-read in Libxml2 - CVE-2017-9050

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Main Vulnerability Database Vulnerabilities #VU9689

Heap-based buffer over-read in Libxml2 - CVE-2017-9050

Published: December 19, 2017


Vulnerability identifier: #VU9689
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-9050
CWE-ID: CWE-126
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

Libxml2
Gentoo Linux
Fedora
IBM Security Guardium
Integrated Management Module II (IMM2)
libxml2
App Connect Enterprise Certified Container

How to mitigate CVE-2017-9050

Install update from vendor's website.

IBM Security Guardium - update to 10.0p400
Integrated Management Module II (IMM2) - addressed in versions 1AOO80G-6.40, 1AOO80G-6.40_bc
libxml2 - addressed in versions 2.9.7-1.fc26, 2.9.7-1.fc27
App Connect Enterprise Certified Container - addressed in versions 5.0.1, 6.1.0

External References

Related Security Bulletins