CVE-2019-12495 — MEDIUM (5.5)

Vulnerability 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.

CVSS Score

5.5

MEDIUM

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Tinycc	Tinycc	0.9.27

Related Weaknesses (CWE)

CWE-787

References

http://www.securityfocus.com/bid/108541
https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.htmlExploitThird Party Advisory
https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5PatchThird Party Advisory
http://www.securityfocus.com/bid/108541
https://lists.nongnu.org/archive/html/tinycc-devel/2019-05/msg00044.htmlExploitThird Party Advisory
https://repo.or.cz/tinycc.git/commit/d04ce7772c2bc2781ab2502e0b1f1964488814b5PatchThird Party Advisory

FAQ

What is CVE-2019-12495?

CVE-2019-12495 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 be...

How severe is CVE-2019-12495?

CVE-2019-12495 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-12495?

Check the references section above for vendor advisories and patch information. Affected products include: Tinycc Tinycc.