Amazon Linux AMI update for subversion, mod_dav_svn

1) OS command injection

EUVDB-ID: #VU7886

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-9800

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The weakness exists due to command injection flaw. A remote attacker (e.g., repository, proxy server) can return a specially crafted 'svn+ssh://' URL during 'checkout', 'export', 'update', and 'switch' commands and execute arbitrary shell commands with privileges of the current user.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages.

i686:
    mod_dav_svn-1.9.7-1.54.amzn1.i686
    mod_dav_svn-debuginfo-1.9.7-1.54.amzn1.i686
    subversion-tools-1.9.7-1.58.amzn1.i686
    subversion-libs-1.9.7-1.58.amzn1.i686
    subversion-devel-1.9.7-1.58.amzn1.i686
    subversion-python27-1.9.7-1.58.amzn1.i686
    subversion-perl-1.9.7-1.58.amzn1.i686
    subversion-debuginfo-1.9.7-1.58.amzn1.i686
    subversion-1.9.7-1.58.amzn1.i686
    subversion-javahl-1.9.7-1.58.amzn1.i686
    mod24_dav_svn-1.9.7-1.58.amzn1.i686
    subversion-ruby-1.9.7-1.58.amzn1.i686
    subversion-python26-1.9.7-1.58.amzn1.i686

src:
    mod_dav_svn-1.9.7-1.54.amzn1.src
    subversion-1.9.7-1.58.amzn1.src

x86_64:
    mod_dav_svn-1.9.7-1.54.amzn1.x86_64
    mod_dav_svn-debuginfo-1.9.7-1.54.amzn1.x86_64
    subversion-tools-1.9.7-1.58.amzn1.x86_64
    subversion-1.9.7-1.58.amzn1.x86_64
    subversion-ruby-1.9.7-1.58.amzn1.x86_64
    subversion-python27-1.9.7-1.58.amzn1.x86_64
    mod24_dav_svn-1.9.7-1.58.amzn1.x86_64
    subversion-perl-1.9.7-1.58.amzn1.x86_64
    subversion-libs-1.9.7-1.58.amzn1.x86_64
    subversion-javahl-1.9.7-1.58.amzn1.x86_64
    subversion-python26-1.9.7-1.58.amzn1.x86_64
    subversion-devel-1.9.7-1.58.amzn1.x86_64
    subversion-debuginfo-1.9.7-1.58.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-883.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.