VDB-8564 · CVE-2013-2020 · BID 59434

SourceFire ClamAV up to 0.97.7 libclamav/pe.c cli_scanpe Packet numeric error

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

A vulnerability was found in SourceFire ClamAV up to 0.97.7 (Anti-Malware Software) and classified as very critical. Affected by this issue is the function cli_scanpe of the file libclamav/pe.c. The manipulation as part of a Packet leads to a numeric error vulnerability. Using CWE to declare the problem leads to CWE-189. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Integer underflow in the cli_scanpe function in pe.c in ClamAV before 0.97.8 allows remote attackers to cause a denial of service (crash) via a skewed offset larger than the size of the PE section in a UPX packed executable, which triggers an out-of-bounds read.

The weakness was shared 04/23/2013 by Felix Groebert with Google Security Team as not defined changelog entry (Website). The advisory is shared for download at freecode.com. This vulnerability is handled as CVE-2013-2020 since 02/19/2013. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/10/2021).

The vulnerability scanner Nessus provides a plugin with the ID 75004 (openSUSE Security Update : clamav (openSUSE-SU-2013:0881-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 121462 (ClamAV Multiple Vulnerabilities).

Upgrading to version 0.97.8 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13010.

The vulnerability is also documented in the vulnerability database at Tenable (75004). The entries 8507, 8565 and 68295 are related to this item.

Productinfo

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License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 75004
Nessus Name: openSUSE Security Update : clamav (openSUSE-SU-2013:0881-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 866024
OpenVAS Name: Fedora Update for clamav FEDORA-2013-10953
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: ClamAV 0.97.8
Patch: github.com
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

02/19/2013 🔍
04/23/2013 +63 days 🔍
04/23/2013 +0 days 🔍
04/23/2013 +0 days 🔍
04/23/2013 +0 days 🔍
04/24/2013 +1 days 🔍
05/03/2013 +9 days 🔍
05/07/2013 +4 days 🔍
05/13/2013 +6 days 🔍
06/13/2014 +396 days 🔍
05/10/2021 +2523 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: freecode.com
Researcher: Felix Groebert
Organization: Google Security Team
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-2020 (🔍)
OVAL: 🔍
IAVM: 🔍

Vulnerability Center: 39470 - ClamAV <0.97.8 Remote DoS and Code Execution Vulnerability by Parsing a UPX-Packed Executable (CVE-2013-2020), Medium
SecurityFocus: 59434 - ClamAV Remote Code Execution And Denial of Service Vulnerabilities
Secunia: 53150 - ClamAV Two Denial of Service Vulnerabilities, Moderately Critical
OSVDB: 92834

See also: 🔍

Entryinfo

Created: 05/03/2013 17:42
Updated: 05/10/2021 10:51
Changes: 05/03/2013 17:42 (82), 05/10/2019 18:39 (12), 05/10/2021 10:51 (2)
Complete: 🔍

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