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CVE-2015-4047

23
FAUCET Score

CVE-2015-4047 describes a denial-of-service vulnerability in racoon/gssapi.c within IPsec-Tools 0.8.2, impacting various distributions like Debian, Fedora, and F5. This flaw allows remote, unauthenticated attackers to trigger a NULL pointer dereference and crash the IKE daemon by sending crafted UDP requests. With a CVSS score of 7.8 (High), it presents a low-complexity attack vector leading to complete system unavailability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion, suggesting it is not currently a high-profile threat.

Impacted Technologies

VendorProductVersion(s)CPE
0.8.2CPE matchmatch criteria
cpe:2.3:a:ipsec-tools:ipsec-tools:0.8.2:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
20CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*
21CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:*
>= 11.4.0, <= 11.6.4CPE matchmatch criteria
cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
9.88%
Probability of exploitation in next 30 days
EPSS Percentile
95.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0988 is in the 92nd percentile among its peer group of 51,485 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

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: ipsec-tools

Vendor Advisories (1)

redhatCVE-2015-4047Moderate

ipsec-tools: NULL pointer dereference in racoon/gssapi.c

May 19, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-June/159482.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-June/159549.html
Mailing ListThird Party Advisory
packetstormsecurity.com / files/131992/IPsec-Tools-0.8.2-Denial-Of-Service.html
Third Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2015/May/81
ExploitMailing ListThird Party Advisory
seclists.org / fulldisclosure/2015/May/83
ExploitMailing ListThird Party Advisory
support.f5.com / csp/article/K05013313
Third Party Advisory
altsci.com / ipsec/ipsec-tools-sa.html
ExploitThird Party Advisory
debian.org / security/2015/dsa-3272
Third Party Advisory
openwall.com / lists/oss-security/2015/05/20/1
ExploitMailing ListThird Party Advisory
openwall.com / lists/oss-security/2015/05/21/11
Mailing ListThird Party Advisory
securityfocus.com / bid/74739
Third Party AdvisoryVDB Entry
securitytracker.com / id/1032397
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2623-1
Third Party Advisory