#VU43283 Resource management error in libssh - CVE-2012-6063

Vulnerability identifier: #VU43283

Vulnerability risk: Medium

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

CVE-ID: CVE-2012-6063

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libssh
Universal components / Libraries / Libraries used by multiple products

Vendor: libssh

Description

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

Double free vulnerability in the sftp_mkdir function in sftp.c in libssh before 0.5.3 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors, a different vector than CVE-2012-4559.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libssh: 0.4.7 - 0.5.1

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External links
https://git.libssh.org/projects/libssh.git/commit/?h=v0-5&id=4d8420f3282ed07fc99fc5e930c17df27ef1e9b2
https://www.debian.org/security/2012/dsa-2577
https://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/
https://bugzilla.redhat.com/show_bug.cgi?id=871612

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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.