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CVE-2015-1788

24
FAUCET Score

CVE-2015-1788 describes a denial-of-service vulnerability in OpenSSL versions prior to 0.9.8s, 1.0.0e, 1.0.1n, and 1.0.2b. Specifically, the BN_GF2m_mod_inv function can enter an infinite loop when processing malformed ECParameters structures in Elliptic Curve algorithms. This vulnerability has a CVSS score of 4.3, indicating a medium severity, and allows remote attackers to cause a denial of service with medium attack complexity. While the FAUCET Risk Score is high at 84/100, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and it is not listed in the KEV catalog. Despite this, community discussion and media coverage suggest a notable level of attention to this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.9.8zfCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.0:*:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.0:beta1:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.0:beta2:*:*:*:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.0.0:beta3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
23.22%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.2322 is in the 98th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

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

Remediation

Vendor Advisories (1)

redhatCVE-2015-1788Moderate

OpenSSL: Malformed ECParameters causes infinite loop

Jun 11, 2015

References

fortiguard.com / advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
fortiguard.com / advisory/openssl-vulnerabilities-june-2015
ftp.netbsd.org / pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc
kb.juniper.net / InfoCenter/index
lists.apple.com / archives/security-announce/2015/Aug/msg00001.html
lists.opensuse.org / opensuse-security-announce/2015-06/msg00023.html
lists.opensuse.org / opensuse-security-announce/2015-06/msg00024.html
lists.opensuse.org / opensuse-security-announce/2015-06/msg00026.html
lists.opensuse.org / opensuse-security-announce/2015-07/msg00003.html
lists.opensuse.org / opensuse-security-announce/2015-07/msg00004.html
lists.opensuse.org / opensuse-security-announce/2015-07/msg00006.html
lists.opensuse.org / opensuse-security-announce/2015-07/msg00007.html
lists.opensuse.org / opensuse-security-announce/2015-07/msg00037.html
lists.opensuse.org / opensuse-security-announce/2016-03/msg00011.html
marc.info
marc.info
bto.bluecoat.com / security-advisory/sa98
cert-portal.siemens.com / productcert/pdf/ssa-412672.pdf
github.com / openssl/openssl/commit/4924b37ee01f71ae19c94a8934b80eeb2f677932
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
kc.mcafee.com / corporate/index
openssl.org / news/secadv/20150611.txt
security.gentoo.org / glsa/201506-02
support.apple.com / kb/HT205031
support.citrix.com / article/CTX216642
openssl.org / news/secadv_20150611.txt
Vendor Advisory
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20150612-openssl
www-304.ibm.com / support/docview.wss
debian.org / security/2015/dsa-3287
fortiguard.com / advisory/2015-06-11-fortinet-vulnerability-openssl-vulnerabilities-june-2015
fortiguard.com / advisory/openssl-vulnerabilities-june-2015
oracle.com / technetwork/security-advisory/cpujul2016-2881720.html
oracle.com / technetwork/security-advisory/cpujul2017-3236622.html
oracle.com / technetwork/security-advisory/cpuoct2016-2881722.html
oracle.com / technetwork/security-advisory/cpuoct2017-3236626.html
oracle.com / technetwork/topics/security/bulletinjul2015-2511963.html
oracle.com / technetwork/topics/security/cpujan2016-2367955.html
oracle.com / technetwork/topics/security/cpuoct2015-2367953.html
securityfocus.com / bid/75158
securityfocus.com / bid/91787
securitytracker.com / id/1032564
ubuntu.com / usn/USN-2639-1