Michal Vasko

10 exploits Active since Dec 2019
CVE-2019-19333 WRITEUP CRITICAL WRITEUP
libyang <1.0-r5 - Buffer Overflow
In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "bits". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.
CVSS 9.8
CVE-2019-19334 WRITEUP CRITICAL WRITEUP
libyang <1.0-r5 - Buffer Overflow
In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "identityref". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.
CVSS 9.8
CVE-2019-20391 WRITEUP MEDIUM WRITEUP
Cesnet Libyang - Memory Corruption
An invalid memory access flaw is present in libyang before v1.0-r3 in the function resolve_feature_value() when an if-feature statement is used inside a bit. Applications that use libyang to parse untrusted input yang files may crash.
CVSS 6.5
CVE-2019-20392 WRITEUP MEDIUM WRITEUP
Cesnet Libyang - Memory Corruption
An invalid memory access flaw is present in libyang before v1.0-r1 in the function resolve_feature_value() when an if-feature statement is used inside a list key node, and the feature used is not defined. Applications that use libyang to parse untrusted input yang files may crash.
CVSS 6.5
CVE-2019-20393 WRITEUP HIGH WRITEUP
Cesnet Libyang - Double Free
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
CVSS 8.8
CVE-2019-20394 WRITEUP HIGH WRITEUP
Cesnet Libyang - Double Free
A double-free is present in libyang before v1.0-r3 in the function yyparse() when a type statement in used in a notification statement. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
CVSS 8.8
CVE-2019-20395 WRITEUP MEDIUM WRITEUP
libyang <v1.0-r1 - Memory Corruption
A stack consumption issue is present in libyang before v1.0-r1 due to the self-referential union type containing leafrefs. Applications that use libyang to parse untrusted input yang files may crash.
CVSS 6.5
CVE-2019-20396 WRITEUP MEDIUM WRITEUP
Cesnet Libyang - Memory Corruption
A segmentation fault is present in yyparse in libyang before v1.0-r1 due to a malformed pattern statement value during lys_parse_path parsing.
CVSS 6.5
CVE-2019-20397 WRITEUP HIGH WRITEUP
Cesnet Libyang - Double Free
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an organization field is not terminated. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
CVSS 8.8
CVE-2019-20398 WRITEUP MEDIUM WRITEUP
Cesnet Libyang - NULL Pointer Dereference
A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.
CVSS 6.5