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amazonAmazonALAS-2015-498
HistoryMar 23, 2015 - 1:42 p.m.

Medium: openssl

2015-03-2313:42:00
alas.aws.amazon.com
33

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

EPSS

0.944

Percentile

99.2%

Issue Overview:

A use-after-free flaw was found in the way OpenSSL importrf certain Elliptic Curve private keys. An attacker could use this flaw to crash OpenSSL, if a specially-crafted certificate was imported. (CVE-2015-0209)

A denial of service flaw was found in the way OpenSSL handled certain SSLv2 messages. A malicious client could send a specially crafted SSLv2 CLIENT-MASTER-KEY message that would cause an OpenSSL server that both supports SSLv2 and enables EXPORT-grade cipher suites to crash. (CVE-2015-0293)

An out-of-bounds write flaw was found in the way OpenSSL reused certain ASN.1 structures. A remote attacker could use a specially crafted ASN.1 structure that, when parsed by an application, would cause that application to crash. (CVE-2015-0287)

A flaw was found in the the ASN (Abstract Syntax Notation) parsing code of OpenSSL. An attacker could present a specially crafted certificate, which when verified by an OpenSSL client or server could cause it to crash. (CVE-2015-0286)

A null-pointer dereference was found in the way OpenSSL handled certain PKCS#7 blobs. An attacker could cause OpenSSL to crash, when applications verify, decrypt or parsed these ASN.1 encoded PKCS#7 blobs. OpenSSL clients and servers are not affected. (CVE-2015-0289)

A NULL pointer dereference flaw was found in OpenSSL’s x509 certificate handling implementation. A remote attacker could use this flaw to crash an OpenSSL server using an invalid certificate key. (CVE-2015-0288)

Affected Packages:

openssl

Issue Correction:
Run yum update openssl to update your system.

New Packages:

i686:  
    openssl-debuginfo-1.0.1k-1.84.amzn1.i686  
    openssl-perl-1.0.1k-1.84.amzn1.i686  
    openssl-1.0.1k-1.84.amzn1.i686  
    openssl-devel-1.0.1k-1.84.amzn1.i686  
    openssl-static-1.0.1k-1.84.amzn1.i686  
  
src:  
    openssl-1.0.1k-1.84.amzn1.src  
  
x86_64:  
    openssl-static-1.0.1k-1.84.amzn1.x86_64  
    openssl-perl-1.0.1k-1.84.amzn1.x86_64  
    openssl-devel-1.0.1k-1.84.amzn1.x86_64  
    openssl-1.0.1k-1.84.amzn1.x86_64  
    openssl-debuginfo-1.0.1k-1.84.amzn1.x86_64  

Additional References

Red Hat: CVE-2015-0209, CVE-2015-0286, CVE-2015-0287, CVE-2015-0288, CVE-2015-0289, CVE-2015-0293

Mitre: CVE-2015-0209, CVE-2015-0286, CVE-2015-0287, CVE-2015-0288, CVE-2015-0289, CVE-2015-0293

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

EPSS

0.944

Percentile

99.2%