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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 31%
VendorProductVersion
gnucflow
1.6
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
cflow
bullseye
unimportant
bookworm
1:1.7-4
fixed
sid
1:1.7-5
fixed
trixie
1:1.7-5
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
cflow
noble
needs-triage
mantic
ignored
lunar
ignored
kinetic
ignored
jammy
needs-triage
impish
ignored
hirsute
ignored
groovy
ignored
focal
needs-triage
bionic
needs-triage
xenial
needs-triage
trusty
dne
Common Weakness Enumeration
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