Heap-based buffer overflow in re2c (Alpine package)



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-11958
CWE-ID CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
 re2c (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU31883

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-11958

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the Scanner::fill in parse/scanner.cc via a long lexeme. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

re2c (Alpine package): 1.3-r0

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=1cc1dd8fb0b7e5663971e24423df2a9725f161a8
https://git.alpinelinux.org/aports/commit/?id=3d1aef7a834fb00abde94c1dbd9e89a7875c3b9c


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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