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F5 BIG-IP - SOL61570943 - libXML2 vulnerabilities CVE-2015-7941 and CVE-2015-7942

Information

Severity

Severity

Medium

Family

Family

F5 Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

6 years ago

Modified

Modified

4 years ago

Summary

The remote host is missing a security patch.

Insight

Insight

libxml2 2.9.2 does not properly stop parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and libxml2 crash) via crafted XML data to the (1) xmlParseEntityDecl or (2) xmlParseConditionalSections function in parser.c, as demonstrated by non-terminated entities. The xmlParseConditionalSections function in parser.c in libxml2 does not properly skip intermediary entities when it stops parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted XML data, a different vulnerability than CVE-2015-7941.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

See the referenced vendor advisory for a solution.

Common Vulnerabilities and Exposures (CVE)