#VU102962 Heap-based buffer overflow in gnulib - CVE-2018-17942

Vulnerability identifier: #VU102962

Vulnerability 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-2018-17942

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
gnulib
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

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 convert_to_decimal function in vasnprintf.c. A remote attacker can trigger a 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

gnulib: 0.0 - 1.0

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External links
https://github.com/coreutils/gnulib/commit/278b4175c9d7dd47c1a3071554aac02add3b3c35
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5UQRNQE6XHMD5UYYHAU3VQWAYHIPMQS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TMGHTVYH3KAFN34QXNSGEQDSTV7MCOQW/
https://lists.gnu.org/archive/html/bug-gnulib/2018-09/msg00107.html
https://savannah.gnu.org/bugs/?func=detailitem&item_id=54686

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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.