Buffer over-read in clamav (Alpine package)



Published: 2018-11-18
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-15378
CWE-ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
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clamav (Alpine package)
Operating systems & Components / Operating system package or component

Vendor Alpine Linux Development Team

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Buffer over-read

EUVDB-ID: #VU15374

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-15378

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition related to MEW unpacker within the unmew11() function in libclamav/mew.c. A remote attacker can create a specially crafted EXE file, pass it to vulnerable application and trigger invalid memory read.

Mitigation

Install update from vendor's website.

Vulnerable software versions

clamav (Alpine package): 0.97.3-r0 - 0.100.1-r1

External links

http://git.alpinelinux.org/aports/commit/?id=5412962cc2f34d4bb2f2996918e1384eda223946
http://git.alpinelinux.org/aports/commit/?id=b34c6efbc0f5941d4099a372533f14885013e380
http://git.alpinelinux.org/aports/commit/?id=be88110b3119e3783d97ab6f259ad7b346dc6203
http://git.alpinelinux.org/aports/commit/?id=fdb3e21e9339a763b32a76726cb3ee43fd4e8772


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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