#VU38975 Out-of-bounds read in libdwarf - CVE-2017-9054

Vulnerability identifier: #VU38975

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-9054

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

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

Vendor: David Anderson

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An issue, also known as DW201703-002, was discovered in libdwarf 2017-03-21. In _dwarf_decode_s_leb128_chk() a byte pointer was dereferenced just before it was checked for being in bounds, leading to a heap-based buffer over-read.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libdwarf: 20170321

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External links
https://www.prevanders.net/dwarfbug.html

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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.