PT-2013-1153 · Openssl+8 · Openssl+10
Karthikeyan Bhargavan
·
Published
2013-12-01
·
Updated
2024-06-15
·
CVE-2015-0205
CVSS v2.0
7.1
High
| Vector | AV:N/AC:M/Au:N/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
OpenSSL versions 1.0.0 through 1.0.0p
OpenSSL versions 1.0.1 through 1.0.1k
openssl-1.0.1e
openssl-devel-1.0.1e
openssl-static-1.0.1e
openssl-libs-1.0.1e
openssl-debuginfo-1.0.1e
Description
The issue allows remote attackers to obtain access without knowledge of a private key via crafted TLS Handshake Protocol traffic to a server that recognizes a Certification Authority with DH support. This is due to the ssl3 get cert verify function in s3 srvr.c in OpenSSL accepting client authentication with a Diffie-Hellman (DH) certificate without requiring a CertificateVerify message. The vulnerability can lead to disruption of protected information and can be exploited remotely.
Recommendations
For OpenSSL versions 1.0.0 through 1.0.0p, update to version 1.0.0p or later.
For OpenSSL versions 1.0.1 through 1.0.1k, update to version 1.0.1k or later.
For openssl-1.0.1e, openssl-devel-1.0.1e, openssl-static-1.0.1e, openssl-libs-1.0.1e, and openssl-debuginfo-1.0.1e, update to a version that is not vulnerable.
As a temporary workaround, consider disabling the
ssl3 get cert verify function until a patch is available.
Restrict access to the vulnerable module to minimize the risk of exploitation.Exploit
Fix
DoS
RCE
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Related Identifiers
Affected Products
Alt Linux
Centos
Cisco Ios
Cisco Ios Xe
Cisco Nexus
Ibm Aix
Junos
Openssl
Red Hat
Suse
Ubuntu