Fedora 29 : clamav (2019-aabcb53ec6)

critical Nessus Plugin ID 128437

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Synopsis

The remote Fedora host is missing a security update.

Description

ClamAV 0.101.4 is a security patch release that addresses the following issues.

- An out of bounds write was possible within ClamAV's NSIS bzip2 library when attempting decompression in cases where the number of selectors exceeded the max limit set by the library (CVE-2019-12900). The issue has been resolved by respecting that limit.

Thanks to Martin Simmons for reporting the issue here.

- The zip bomb vulnerability mitigated in 0.101.3 has been assigned the CVE identifier CVE-2019-12625.
Unfortunately, a workaround for the zip-bomb mitigation was immediately identified. To remediate the zip-bomb scan time issue, a scan time limit has been introduced in 0.101.4. This limit now resolves ClamAV's vulnerability to CVE-2019-12625.

The default scan time limit is 2 minutes (120000 milliseconds).

To customize the time limit :

- use the clamscan --max-scantime option

- use the clamd MaxScanTime config option

Libclamav users may customize the time limit using the cl_engine_set_num function. For example :

C cl_engine_set_num(engine, CL_ENGINE_MAX_SCANTIME, time_limit_milliseconds)

Thanks to David Fifield for reviewing the zip-bomb mitigation in 0.101.3 and reporting the issue.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected clamav package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2019-aabcb53ec6

Plugin Details

Severity: Critical

ID: 128437

File Name: fedora_2019-aabcb53ec6.nasl

Version: 1.3

Type: local

Agent: unix

Published: 9/3/2019

Updated: 12/31/2019

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:clamav, cpe:/o:fedoraproject:fedora:29

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/1/2019

Vulnerability Publication Date: 6/19/2019

Reference Information

CVE: CVE-2019-12625, CVE-2019-12900