5.0
MEDIUM
CVE-2011-2721
ClamAV Off-by-One Error Denial of Service
Description

Off-by-one error in the cli_hm_scan function in matcher-hash.c in libclamav in ClamAV before 0.97.2 allows remote attackers to cause a denial of service (daemon crash) via an e-mail message that is not properly handled during certain hash calculations.

INFO

Published Date :

Aug. 5, 2011, 9:55 p.m.

Last Modified :

Feb. 13, 2023, 4:31 a.m.

Remotely Exploitable :

Yes !

Impact Score :

2.9

Exploitability Score :

10.0
Affected Products

The following products are affected by CVE-2011-2721 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Clamav clamav

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2011-2721 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2011-2721 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 13, 2023

    Action Type Old Value New Value
    Removed Reference http://git.clamav.net/gitweb?p=clamav-devel.git;a=blob_plain;f=ChangeLog;hb=clamav-0.97.2 [No Types Assigned]
    Removed Reference http://git.clamav.net/gitweb?p=clamav-devel.git;a=commit;h=4842733eb3f09be61caeed83778bb6679141dbc5 [Patch]
    Added Reference http://git.clamav.net/gitweb?p=clamav-devel.git%3Ba=commit%3Bh=4842733eb3f09be61caeed83778bb6679141dbc5 [No Types Assigned]
    Added Reference http://git.clamav.net/gitweb?p=clamav-devel.git%3Ba=blob_plain%3Bf=ChangeLog%3Bhb=clamav-0.97.2 [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 29, 2017

    Action Type Old Value New Value
    Removed Reference http://xforce.iss.net/xforce/xfdb/68785 [No Types Assigned]
    Added Reference https://exchange.xforce.ibmcloud.com/vulnerabilities/68785 [No Types Assigned]
  • Initial Analysis by [email protected]

    Aug. 08, 2011

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2011-2721 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2011-2721 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

7.08 }} 0.00%

score

0.92894

percentile

CVSS2 - Vulnerability Scoring System
Access Vector
Access Complexity
Authentication
Confidentiality
Integrity
Availability