GLSA 201702-01: PCSC-Lite: Multiple vulnerabilities
| Severity: | normal |
| Title: | PCSC-Lite: Multiple vulnerabilities |
| Date: | 02/01/2017 |
| Bugs: | |
| ID: | 201702-01 |
Synopsis
Multiple vulnerabilities have been found in PCSC-Lite, the worst of which could lead to privilege escalation.Background
PCSC-Lite is a middleware to access a smart card using the SCard API (PC/SC).
Affected packages
| Package | Vulnerable | Unaffected | Architecture(s) |
|---|---|---|---|
| sys-apps/pcsc-lite | < 1.8.20 | >= 1.8.20 | All supported architectures |
Description
The SCardReleaseContext function normally releases resources associated with the given handle (including “cardsList”) and clients should cease using this handle. However, a malicious client can make the daemon invoke SCardReleaseContext and continue issuing other commands that use “cardsList”, resulting in a use-after-free. When SCardReleaseContext is invoked multiple times it additionally results in a double-free of “cardsList”.
Impact
A local attacker could use a malicious client to connect to pcscd’s Unix socket, possibly resulting in a Denial of Service condition or privilege escalation since the daemon is running as root.
Workaround
There is no known workaround at this time.
Resolution
All PCSC-Lite users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/pcsc-lite-1.8.20"
References
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.