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VULNERABILITIES

CVE-2020-23856 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284 CVEExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLSXGFK2NYPCJMPHSHE3W56ZU3ZO6RD7/ CVE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZTTKZX274BVFZX7TMPEZG6UWL6UPMQF/ CVE
https://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.html CVEExploitMailing ListVendor Advisory
https://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284 [email protected]ExploitThird Party Advisory

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-416Use After Free[email protected]

Affected Products

ProductVersions
gnu cflow
1.6

CPE

  • cpe:2.3:a:gnu:cflow:1.6:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
fedoraproject fedora
33
34

CPE

  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

7 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2020-23856
NVD Published Date:
May 18, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2020-23856 Details - Not Deferred