CVE-2019-12495

Public Exploit

Description

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.20%
Third-Party Advisory nongnu.org Third-Party Advisory or.cz
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.html third party advisory exploit
https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5 third party advisory patch
http://www.securityfocus.com/bid/108541 vdb entry

Frequently Asked Questions

What is the severity of CVE-2019-12495?
CVE-2019-12495 has been scored as a medium severity vulnerability.
How to fix CVE-2019-12495?
To fix CVE-2019-12495, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-12495 being actively exploited in the wild?
It is possible that CVE-2019-12495 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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