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CVE-2015-2313

20
FAUCET Score

CVE-2015-2313 describes a denial-of-service vulnerability in Sandstorm Cap'n Proto versions prior to 0.4.1.1 and 0.5.x before 0.5.1.2. Remote attackers can trigger high CPU consumption by sending a crafted small message that causes an application invoking the totalSize method on an object reader to enter a tight for loop. This vulnerability has a CVSS score of 7.5 (HIGH), indicating it can be exploited over the network with low attack complexity, leading to a complete loss of availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.4.1.0CPE matchmatch criteria
cpe:2.3:a:capnproto:capnproto:*:*:*:*:*:*:*:*
0.5.0.0CPE matchmatch criteria
cpe:2.3:a:capnproto:capnproto:0.5.0.0:*:*:*:*:*:*:*
0.5.1.0CPE matchmatch criteria
cpe:2.3:a:capnproto:capnproto:0.5.1.0:*:*:*:*:*:*:*
0.5.1.1CPE matchmatch criteria
cpe:2.3:a:capnproto:capnproto:0.5.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.89%
Probability of exploitation in next 30 days
EPSS Percentile
77.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0189 is in the 61st percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugs.debian.org / cgi-bin/bugreport.cgi
Mailing ListThird Party Advisory
github.com / capnproto/capnproto/blob/master/security-advisories/2015-03-05-0-c%2B%2B-addl-cpu-amplification.md
Third Party Advisory
github.com / capnproto/capnproto/commit/80149744bdafa3ad4eedc83f8ab675e27baee868
Third Party Advisory
openwall.com / lists/oss-security/2015/03/17/3
Mailing ListThird Party Advisory