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Files from Christian Mainka

Email addresschristian.mainka at rub.de
First Active2013-07-09
Last Active2019-10-01
Practical Decryption exFiltration: Breaking PDF Encryption
Posted Oct 1, 2019
Authored by Christian Mainka, Vladislav Mladenov, Jens Mueller, Jorg Schwenk, Sebastian Schinzel, Fabian Ising

The Portable Document Format, better known as PDF, is one of the most widely used document formats worldwide, and in order to ensure information confidentiality, this file format supports document encryption. In this paper, the authors analyze PDF encryption and show two novel techniques for breaking the confidentiality of encrypted documents.

tags | paper
SHA-256 | 517f98746fe2867354db4d9e80fb07916b9d1d2b6c386ab280af27aaadc9b848
PDF Viewer Signatures Broken
Posted Feb 26, 2019
Authored by Christian Mainka, Vladislav Mladenov, Jorg Schwenk, Karsten Meyer zu Sel-hausen, Martin Grothe | Site nds.ruhr-uni-bochum.de

Researchers from Ruhr-University Bochum in Germany have broken digital signatures on PDFs and managed to create fake signatures on 21 of 22 viewer apps and five out of the seven online PDF digital signing services. This archive contains both whitepapers produced by the university.

tags | exploit, paper
SHA-256 | 88efe7b286cbc56d82c5c5093004db6c1d519f7e41fd7cd34e4b3af7a7a513a3
Drupal 6.x / 7.x Impersonation / Access Bypass / Hardening
Posted Jan 16, 2014
Authored by David Rothstein, Damien Tournoud, Christian Mainka, Matt Vance, Vladislav Mladenov | Site drupal.org

Drupal core versions 6.x and 7.x suffer from impersonation, access bypass, and security hardening vulnerabilities.

tags | advisory, vulnerability
SHA-256 | f5c6a398f6c3eb4be7409e8de673476647efb02968ec5e6d76e45d68ffbfdae9
Apache CXF 2.5.10 / 2.6.7 / 2.7.4 Denial Of Service
Posted Jul 9, 2013
Authored by A. Falkenberg, Joerg Schwenk, Juraj Somorovsky, Christian Mainka | Site sec-consult.com

Apache CXF versions prior to 2.5.10, 2.6.7, and 2.7.4 suffer from a denial of service vulnerability.

tags | exploit, denial of service
advisories | CVE-2013-2160
SHA-256 | bd800eccaafd0f41d9a2aa6be1e7ad144231f64eaa6af3b4f06fce8a84901843
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