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CVE-2011-1175

18
FAUCET Score

CVE-2011-1175 describes a denial-of-service vulnerability in Asterisk Open Source versions 1.6.1.x, 1.6.2.x, and 1.8.x. Remote attackers can crash the Asterisk daemon by establishing numerous short TCP sessions to services utilizing a specific TLS API, leading to a NULL pointer dereference. This vulnerability has a CVSS score of 5.0, indicating a medium severity, and can be exploited remotely with low attack complexity, resulting in a partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.6.1CPE matchmatch criteria
cpe:2.3:a:digium:asterisk:1.6.1:*:*:*:*:*:*:*
1.6.1CPE matchmatch criteria
cpe:2.3:a:digium:asterisk:1.6.1:beta1:*:*:*:*:*:*
1.6.1CPE matchmatch criteria
cpe:2.3:a:digium:asterisk:1.6.1:beta2:*:*:*:*:*:*
1.6.1CPE matchmatch criteria
cpe:2.3:a:digium:asterisk:1.6.1:beta3:*:*:*:*:*:*
1.6.1CPE matchmatch criteria
cpe:2.3:a:digium:asterisk:1.6.1:beta4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.72%
Probability of exploitation in next 30 days
EPSS Percentile
84.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0272 is in the 77th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

fedorapatch availablevia nvd_reference
View patch

References

downloads.asterisk.org / pub/security/AST-2011-004.html
PatchVendor Advisory
lists.fedoraproject.org / pipermail/package-announce/2011-March/056945.html
Patch
lists.fedoraproject.org / pipermail/package-announce/2011-March/057156.html
lists.fedoraproject.org / pipermail/package-announce/2011-March/057163.html
openwall.com / lists/oss-security/2011/03/17/5
openwall.com / lists/oss-security/2011/03/21/12
Patch
bugzilla.redhat.com / show_bug.cgi
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/66140
debian.org / security/2011/dsa-2225
securityfocus.com / bid/46898
vupen.com / english/advisories/2011/0686
Vendor Advisory
vupen.com / english/advisories/2011/0790
Vendor Advisory