PT-2015-1689 · Openssl+7 · Openssl+10
Joseph Birr-Pixton
·
Published
2014-10-24
·
Updated
2024-06-15
·
CVE-2015-1788
CVSS v2.0
4.3
Medium
| Vector | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Name of the Vulnerable Software and Affected Versions
OpenSSL versions prior to 0.9.8s
OpenSSL versions 1.0.0 prior to 1.0.0e
OpenSSL versions 1.0.1 prior to 1.0.1n
OpenSSL versions 1.0.2 prior to 1.0.2b
Description
The issue is related to the BN GF2m mod inv function in OpenSSL, which does not properly handle ECParameters structures in which the curve is over a malformed binary polynomial field. This allows remote attackers to cause a denial of service (infinite loop) via a session that uses an Elliptic Curve algorithm. The vulnerability is associated with resource management errors and can be exploited by a remote attacker to cause a denial of service due to errors that occur during the establishment of a session that uses an Elliptic Curve-based algorithm.
Recommendations
For OpenSSL versions prior to 0.9.8s, update to version 0.9.8s or later.
For OpenSSL versions 1.0.0 prior to 1.0.0e, update to version 1.0.0e or later.
For OpenSSL versions 1.0.1 prior to 1.0.1n, update to version 1.0.1n or later.
For OpenSSL versions 1.0.2 prior to 1.0.2b, update to version 1.0.2b or later.
As a temporary workaround, consider disabling the use of Elliptic Curve algorithms until a patch is available.
Exploit
Fix
DoS
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Cisco Ios
Cisco Ios Xe
Cisco Nexus
Cisco Wls
Hp-Ux
Ibm Aix
Junos
Openssl
Suse
Ubuntu