PT-2012-1038 · Libssh · Libssh

Florian Weimer · Published 2012-11-30 · Updated 2014-02-21 · CVE-2012-6063

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions libssh versions prior to 0.5.3

Description The issue is related to a double free vulnerability in the sftp mkdir function in sftp.c, which can be exploited by remote attackers to cause a denial of service (crash) and possibly execute arbitrary code. The vulnerability can be exploited via unspecified vectors. Additionally, there are multiple vulnerabilities in the libssh package that can lead to violations of confidentiality, integrity, and availability of protected information. These vulnerabilities can be exploited remotely.

Recommendations For libssh versions prior to 0.5.3, update to version 0.5.3 or later to resolve the issue. As a temporary workaround, consider restricting access to the sftp mkdir function until a patch is available.

Fix

Weakness Enumeration

CWE-399

Related Identifiers

BDU:2015-02019

BDU:2015-09720

CVE-2012-6063

DSA-2577-1

Affected Products

Libssh

References · 16

• http://debian.org/security/2012/dsa-2577 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2012-6063 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-6063 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4561 · Security Note
• https://osv.dev/vulnerability/CVE-2012-6063 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4562 · Security Note
• https://bdu.fstec.ru/vul/2015-09720 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4559 · Security Note
• http://libssh.org/2012/11/20/libssh-0-5-3-security-release · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2012-6063 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2012-6063 · Vendor Advisory
• https://bdu.fstec.ru/vul/2015-02019 · Security Note
• http://debian.org/security/dsa-2577 · Note
• http://git.libssh.org/projects/libssh.git/commit/?h=v0-5&id=4d8420f3282ed07fc99fc5e930c17df27ef1e9b2 · Note
• http://security.gentoo.org/glsa/glsa-201402-26.xml · Note