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.

CVSS v3.1

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0

2.1 LOWAV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS

0.42% chance of exploitation in the next 30 days, 35th percentile

Published

2021-05-18

Updated

2024-08-04

Proof-of-concept exploits (2)

• yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284
• https://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.html

References

• CVE Record
• NVD entry

Related

• CVE-2021-3200
• CVE-2021-44568
• CVE-2020-23852
• CVE-2020-23861
• CVE-2020-23851
• CVE-2020-23864