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centosCentOS ProjectCESA-2006:0661-01
HistorySep 11, 2006 - 12:52 a.m.

openssl, openssl095a, openssl096 security update

2006-09-1100:52:04
CentOS Project
lists.centos.org
46

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.093 Low

EPSS

Percentile

94.5%

CentOS Errata and Security Advisory CESA-2006:0661-01

The OpenSSL toolkit provides support for secure communications between
machines. OpenSSL includes a certificate management tool and shared
libraries which provide various cryptographic algorithms and protocols.

Daniel Bleichenbacher recently described an attack on PKCS #1 v1.5
signatures. Where an RSA key with exponent 3 is used it may be possible
for an attacker to forge a PKCS #1 v1.5 signature that would be incorrectly
verified by implementations that do not check for excess data in the RSA
exponentiation result of the signature.

The Google Security Team discovered that OpenSSL is vulnerable to this
attack. This issue affects applications that use OpenSSL to verify X.509
certificates as well as other uses of PKCS #1 v1.5. (CVE-2006-4339)

This errata also resolves a problem where a customized ca-bundle.crt file
was overwritten when the openssl package was upgraded.

Users are advised to upgrade to these updated packages, which contain a
backported patch to correct this issue.

Note: After installing this update, users are advised to either restart all
services that use OpenSSL or restart their system.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2006-September/075379.html

Affected packages:
openssl
openssl-devel
openssl-perl
openssl095a
openssl096

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.093 Low

EPSS

Percentile

94.5%

Related for CESA-2006:0661-01