Amazon Linux AMI update for openssh



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2014-2532
CVE-2014-2653
CWE-ID CWE-264
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32557

Risk: Medium

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-2532

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote authenticated user to read and manipulate data.

sshd in OpenSSH before 6.6 does not properly support wildcards on AcceptEnv lines in sshd_config, which allows remote attackers to bypass intended environment restrictions by using a substring located before a wildcard character.

Mitigation

Update the affected packages:

i686:
    openssh-clients-6.2p2-8.41.amzn1.i686
    openssh-6.2p2-8.41.amzn1.i686
    pam_ssh_agent_auth-0.9.3-5.8.41.amzn1.i686
    openssh-server-6.2p2-8.41.amzn1.i686
    openssh-keycat-6.2p2-8.41.amzn1.i686
    openssh-ldap-6.2p2-8.41.amzn1.i686
    openssh-debuginfo-6.2p2-8.41.amzn1.i686

src:
    openssh-6.2p2-8.41.amzn1.src

x86_64:
    openssh-ldap-6.2p2-8.41.amzn1.x86_64
    openssh-clients-6.2p2-8.41.amzn1.x86_64
    pam_ssh_agent_auth-0.9.3-5.8.41.amzn1.x86_64
    openssh-6.2p2-8.41.amzn1.x86_64
    openssh-keycat-6.2p2-8.41.amzn1.x86_64
    openssh-debuginfo-6.2p2-8.41.amzn1.x86_64
    openssh-server-6.2p2-8.41.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2014-369.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU33294

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-2653

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The verify_host_key function in sshconnect.c in the client in OpenSSH 6.6 and earlier allows remote servers to trigger the skipping of SSHFP DNS RR checking by presenting an unacceptable HostCertificate.

Mitigation

Update the affected packages:

i686:
    openssh-clients-6.2p2-8.41.amzn1.i686
    openssh-6.2p2-8.41.amzn1.i686
    pam_ssh_agent_auth-0.9.3-5.8.41.amzn1.i686
    openssh-server-6.2p2-8.41.amzn1.i686
    openssh-keycat-6.2p2-8.41.amzn1.i686
    openssh-ldap-6.2p2-8.41.amzn1.i686
    openssh-debuginfo-6.2p2-8.41.amzn1.i686

src:
    openssh-6.2p2-8.41.amzn1.src

x86_64:
    openssh-ldap-6.2p2-8.41.amzn1.x86_64
    openssh-clients-6.2p2-8.41.amzn1.x86_64
    pam_ssh_agent_auth-0.9.3-5.8.41.amzn1.x86_64
    openssh-6.2p2-8.41.amzn1.x86_64
    openssh-keycat-6.2p2-8.41.amzn1.x86_64
    openssh-debuginfo-6.2p2-8.41.amzn1.x86_64
    openssh-server-6.2p2-8.41.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2014-369.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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