Amazon Linux AMI update for clamav

Published: 2019-05-20

Risk	Medium
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2019-1787 CVE-2019-1788 CVE-2019-1789
CWE-ID	CWE-125 CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU32026

Risk: Medium

CVSSv3.1: 4.8 [AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1787

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the Portable Document Format (PDF) scanning functionality of Clam AntiVirus (ClamAV) Software versions 0.101.1 and prior could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a lack of proper data handling mechanisms within the device buffer while indexing remaining file data on an affected device. An attacker could exploit this vulnerability by sending crafted PDF files to an affected device. A successful exploit could allow the attacker to cause a heap buffer out-of-bounds read condition, resulting in a crash that could result in a denial of service condition on an affected device. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected packages:

i686:
    clamav-lib-0.101.2-1.38.amzn1.i686
    clamav-update-0.101.2-1.38.amzn1.i686
    clamav-debuginfo-0.101.2-1.38.amzn1.i686
    clamav-0.101.2-1.38.amzn1.i686
    clamd-0.101.2-1.38.amzn1.i686
    clamav-db-0.101.2-1.38.amzn1.i686
    clamav-devel-0.101.2-1.38.amzn1.i686
    clamav-milter-0.101.2-1.38.amzn1.i686

noarch:
    clamav-data-0.101.2-1.38.amzn1.noarch
    clamav-filesystem-0.101.2-1.38.amzn1.noarch

src:
    clamav-0.101.2-1.38.amzn1.src

x86_64:
    clamav-lib-0.101.2-1.38.amzn1.x86_64
    clamav-devel-0.101.2-1.38.amzn1.x86_64
    clamav-db-0.101.2-1.38.amzn1.x86_64
    clamav-debuginfo-0.101.2-1.38.amzn1.x86_64
    clamd-0.101.2-1.38.amzn1.x86_64
    clamav-0.101.2-1.38.amzn1.x86_64
    clamav-milter-0.101.2-1.38.amzn1.x86_64
    clamav-update-0.101.2-1.38.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1213.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Input validation error

EUVDB-ID: #VU32027

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1788

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

A vulnerability in the Object Linking & Embedding (OLE2) file scanning functionality of Clam AntiVirus (ClamAV) Software versions 0.101.1 and prior could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to a lack of proper input and validation checking mechanisms for OLE2 files sent an affected device. An attacker could exploit this vulnerability by sending malformed OLE2 files to the device running an affected version ClamAV Software. An exploit could allow the attacker to cause an out-of-bounds write condition, resulting in a crash that could result in a denial of service condition on an affected device.

Mitigation

Update the affected packages:

i686:
    clamav-lib-0.101.2-1.38.amzn1.i686
    clamav-update-0.101.2-1.38.amzn1.i686
    clamav-debuginfo-0.101.2-1.38.amzn1.i686
    clamav-0.101.2-1.38.amzn1.i686
    clamd-0.101.2-1.38.amzn1.i686
    clamav-db-0.101.2-1.38.amzn1.i686
    clamav-devel-0.101.2-1.38.amzn1.i686
    clamav-milter-0.101.2-1.38.amzn1.i686

noarch:
    clamav-data-0.101.2-1.38.amzn1.noarch
    clamav-filesystem-0.101.2-1.38.amzn1.noarch

src:
    clamav-0.101.2-1.38.amzn1.src

x86_64:
    clamav-lib-0.101.2-1.38.amzn1.x86_64
    clamav-devel-0.101.2-1.38.amzn1.x86_64
    clamav-db-0.101.2-1.38.amzn1.x86_64
    clamav-debuginfo-0.101.2-1.38.amzn1.x86_64
    clamd-0.101.2-1.38.amzn1.x86_64
    clamav-0.101.2-1.38.amzn1.x86_64
    clamav-milter-0.101.2-1.38.amzn1.x86_64
    clamav-update-0.101.2-1.38.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1213.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

3) Out-of-bounds read

EUVDB-ID: #VU30707

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-2019-1789

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

Exploit availability: No

Description

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

ClamAV versions prior to 0.101.2 are susceptible to a denial of service (DoS) vulnerability. An out-of-bounds heap read condition may occur when scanning PE files. An example is Windows EXE and DLL files that have been packed using Aspack as a result of inadequate bound-checking.

Mitigation

Update the affected packages:

i686:
    clamav-lib-0.101.2-1.38.amzn1.i686
    clamav-update-0.101.2-1.38.amzn1.i686
    clamav-debuginfo-0.101.2-1.38.amzn1.i686
    clamav-0.101.2-1.38.amzn1.i686
    clamd-0.101.2-1.38.amzn1.i686
    clamav-db-0.101.2-1.38.amzn1.i686
    clamav-devel-0.101.2-1.38.amzn1.i686
    clamav-milter-0.101.2-1.38.amzn1.i686

noarch:
    clamav-data-0.101.2-1.38.amzn1.noarch
    clamav-filesystem-0.101.2-1.38.amzn1.noarch

src:
    clamav-0.101.2-1.38.amzn1.src

x86_64:
    clamav-lib-0.101.2-1.38.amzn1.x86_64
    clamav-devel-0.101.2-1.38.amzn1.x86_64
    clamav-db-0.101.2-1.38.amzn1.x86_64
    clamav-debuginfo-0.101.2-1.38.amzn1.x86_64
    clamd-0.101.2-1.38.amzn1.x86_64
    clamav-0.101.2-1.38.amzn1.x86_64
    clamav-milter-0.101.2-1.38.amzn1.x86_64
    clamav-update-0.101.2-1.38.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1213.html

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.