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CVE-2014-3879

Status Candidate

Overview

OpenPAM Nummularia 9.2 through 10.0 does not properly handle the error reported when an include directive refers to a policy that does not exist, which causes the loaded policy chain to no be discarded and allows context-dependent attackers to bypass authentication via a login (1) without a password or (2) with an incorrect password.

Related Files

FreeBSD Security Advisory - PAM Policy Parser
Posted Jun 4, 2014
Site security.freebsd.org

FreeBSD Security Advisory - The OpenPAM library searches for policy definitions in several locations. While doing so, the absence of a policy file is a soft failure (handled by searching in the next location) while the presence of an invalid file is a hard failure (handled by returning an error to the caller). The policy parser returns the same error code (ENOENT) when a syntactically valid policy references a non-existent module as when the requested policy file does not exist. The search loop regards this as a soft failure and looks for the next similarly-named policy, without discarding the partially-loaded configuration. A similar issue can arise if a policy contains an include directive that refers to a non-existent policy.

tags | advisory
systems | freebsd
advisories | CVE-2014-3879
SHA-256 | c172f1629a0148dc04e340253e113146894af7408276fd65c6e6c6e3a50f19a6
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