CVE-2019-12495

An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to a one-byte out-of-bounds write in the gsym_addr function in x86_64-gen.c. This occurs because tccasm.c mishandles section switches.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
NONE
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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: 42%
VendorProductVersion
tinycctinycc
0.9.27
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
tcc
bookworm
0.9.27+git20200814.62c30a4a-1
fixed
bullseye
0.9.27+git20200814.62c30a4a-1
fixed
buster
ignored
stretch
ignored
jessie
no-dsa
sid
0.9.27+git20200814.62c30a4a-2
fixed
trixie
0.9.27+git20200814.62c30a4a-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
tcc
noble
not-affected
mantic
not-affected
lunar
not-affected
kinetic
not-affected
jammy
not-affected
impish
not-affected
hirsute
not-affected
groovy
not-affected
focal
needed
eoan
ignored
disco
ignored
cosmic
ignored
bionic
needed
xenial
needed
trusty
dne
Common Weakness Enumeration
References
http://www.securityfocus.com/bid/108541
https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.html
https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5
http://www.securityfocus.com/bid/108541
https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.html
https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5