Index: security/vuxml/vuln.xml =================================================================== --- security/vuxml/vuln.xml +++ security/vuxml/vuln.xml @@ -58,6 +58,61 @@ * Do not forget port variants (linux-f10-libxml2, libxml2, etc.) --> + + bro -- Unsafe integer conversions can cause unintentional code paths to be executed + + + bro + 2.6.2 + + + + +

Jon Siwek of Corelight reports:

+
The following Denial of Service vulnerabilities are addressed:
+
+
Integer type mismatches in BinPAC-generated parser code + and Bro analyzer code may allow for crafted packet data + to cause unintentional code paths in the analysis logic + to be taken due to unsafe integer conversions causing the + parser and analysis logic to each expect different fields + to have been parsed. One such example, reported by Maksim + Shudrak, causes the Kerberos analyzer to dereference a + null pointer. CVE-2019-12175 was assigned for this issue.
+ +
The Kerberos parser allows for several fields to be left + uninitialized, but they were not marked with an &optional + attribute and several usages lacked existence checks. + Crafted packet data could potentially cause an attempt + to access such uninitialized fields, generate a runtime + error/exception, and leak memory. Existence checks and + &optional attributes have been added to the relevent + Kerberos fields.
+ +
BinPAC-generated protocol parsers commonly contain fields + whose length is derived from other packet input, and for + those that allow for incremental parsing, BinPAC did not + impose a limit on how large such a field could grow, + allowing for remotely-controlled packet data to cause + growth of BinPAC's flowbuffer bounded only by the numeric + limit of an unsigned 64-bit integer, leading to memory + exhaustion. There is now a generalized limit for how + large flowbuffers are allowed to grow, tunable by setting + "BinPAC::flowbuffer_capacity_max".
+
+

+ + + + CVE-2017-12175 + + + 2019-05-29 + 2019-05-31 + + + ImageMagick -- multiple vulnerabilities