CVE-2011-2516

Xml Security For C\+\+ vulnerability

CVSS

5.0

EPSS

7.7%

EPSS pct

94th

Exploited

No known

Off-by-one error in the XML signature feature in Apache XML Security for C++ 1.6.0, as used in Shibboleth before 2.4.3 and possibly other products, allows remote attackers to cause a denial of service (crash) via a signature using a large RSA key, which triggers a buffer overflow.

Affected vendor

Apache

Affected product

Xml Security For C\+\+

CVSS vector

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

Weakness type (CWE)

CWE-189

Published

2011-07-11

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 7.7% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2011-2516

Confirm whether Apache Xml Security For C\+\+ is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2011-2516.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-2516

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