CVE-2015-1788
The BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c in OpenSSL before 0.9.8s, 1.0.0 before 1.0.0e, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b does not properly handle ECParameters structures in which the curve is over a malformed binary polynomial…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 20.5%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
The BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c in OpenSSL before 0.9.8s, 1.0.0 before 1.0.0e, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b does not properly handle ECParameters structures in which the curve is over a malformed binary polynomial field, which allows remote attackers to cause a denial of service (infinite loop) via a session that uses an Elliptic Curve algorithm, as demonstrated by an attack against a server that supports client authentication.
- CVSS 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
- EPSS
- 20.51% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- openssl/openssl
- Source
- secalert@redhat.com
EPSS moved from 20.4% on 22 October 2026 to 20.5% on 4 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery
- http://fortiguard.com/advisory/openssl-vulnerabilities-june-2015
- http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694
- http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html
- http://marc.info/?l=bugtraq&m=143880121627664&w=2
- http://marc.info/?l=bugtraq&m=144050155601375&w=2
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150612-openssl
- http://www-304.ibm.com/support/docview.wss?uid=swg21960041
- http://www.debian.org/security/2015/dsa-3287
- http://www.fortiguard.com/advisory/2015-06-11-fortinet-vulnerability-openssl-vulnerabilities-june-2015
- http://www.fortiguard.com/advisory/openssl-vulnerabilities-june-2015
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- http://www.securityfocus.com/bid/75158
- http://www.securityfocus.com/bid/91787
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.