Vulnerability Details CVE-2020-23856
Use-after-Free vulnerability in cflow 1.6 in the void call(char *name, int line) function at src/parser.c, which could cause a denial of service via the pointer variable caller->callee.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 31.3%
CVSS Severity
CVSS v3 Score 5.5
CVSS v2 Score 2.1
References
- https://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLSXGFK2NYPCJMPHSHE3W56ZU3ZO6RD7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZTTKZX274BVFZX7TMPEZG6UWL6UPMQF/
- https://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.html
- https://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLSXGFK2NYPCJMPHSHE3W56ZU3ZO6RD7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZTTKZX274BVFZX7TMPEZG6UWL6UPMQF/
- https://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.html
Products affected by CVE-2020-23856
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cpe:2.3:a:gnu:cflow:1.6
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cpe:2.3:o:fedoraproject:fedora:33
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cpe:2.3:o:fedoraproject:fedora:34