CVEvulnerability
CVE-2020-23856
5.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-05-18
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 2.1 LOW — AV:L/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-416
Description
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.
Affected configurations
• gnu cflow 1.6
• fedoraproject fedora 33
• fedoraproject fedora 34
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284 Exploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLSXGFK2NYPCJMPHSHE3W56ZU3ZO6RD7/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZTTKZX274BVFZX7TMPEZG6UWL6UPMQF/ lists.fedoraproject.org
- https://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.html Exploit, Mailing List, Vendor Advisory
- https://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284 Exploit, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLSXGFK2NYPCJMPHSHE3W56ZU3ZO6RD7/ lists.fedoraproject.org
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZTTKZX274BVFZX7TMPEZG6UWL6UPMQF/ lists.fedoraproject.org
- https://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.html Exploit, Mailing List, Vendor Advisory