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CVE-2012-4561

Date: November 30, 2012

The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free "an invalid pointer on an error path," which might allow remote attackers to cause a denial of service (crash) via unspecified vectors.

Severity Score

Related Resources (15)

http://www.debian.org/security/2012/dsa-2577
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093313.html
http://lists.opensuse.org/opensuse-updates/2012-12/msg00016.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/093474.html
http://www.libssh.org/2012/11/20/libssh-0-5-3-security-release/
http://www.openwall.com/lists/oss-security/2012/11/20/3
http://lists.opensuse.org/opensuse-updates/2013-01/msg00021.html
http://www.ubuntu.com/usn/USN-1640-1
https://nvd.nist.gov/vuln/detail/CVE-2012-4561
http://www.mandriva.com/security/advisories?name=MDVSA-2012:175
https://exchange.xforce.ibmcloud.com/vulnerabilities/80220
http://www.securityfocus.com/bid/56604
https://bugzilla.redhat.com/show_bug.cgi?id=871617
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00002.html
https://www.mend.io/vulnerability-database/CVE-2012-4561

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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