Test ID:	1.3.6.1.4.1.25623.1.1.1.2.2023.3559
Category:	Debian Local Security Checks
Title:	Debian: Security Advisory (DLA-3559-1)
Summary:	The remote host is missing an update for the Debian 'libssh2' package(s) announced via the DLA-3559-1 advisory.
Description:	Summary: The remote host is missing an update for the Debian 'libssh2' package(s) announced via the DLA-3559-1 advisory. Vulnerability Insight: Vulnerabilities were found in libssh2, a client-side C library implementing the SSH2 protocol, which could lead to denial of service or remote information disclosure. CVE-2019-13115 Kevin Backhouse discovered an integer overflow vulnerability in kex.c's kex_method_diffie_hellman_group_exchange_sha256_key_exchange() function, which could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises an SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. CVE-2019-17498 Kevin Backhouse discovered that the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, thereby enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A malicious SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. CVE-2020-22218 An issue was discovered in function _libssh2_packet_add(), which could allow attackers to access out of bounds memory. For Debian 10 buster, these problems have been fixed in version 1.8.0-2.1+deb10u1. We recommend that you upgrade your libssh2 packages. For the detailed security status of libssh2 please refer to its security tracker page at: [link moved to references] Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references] Affected Software/OS: 'libssh2' package(s) on Debian 10. Solution: Please install the updated package(s). CVSS Score: 5.8 CVSS Vector: AV:N/AC:M/Au:N/C:P/I:N/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2019-13115 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M7IF3LNHOA75O4WZWIHJLIRMA5LJUED3/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6LUNHPW64IGCASZ4JQ2J5KDXNZN53DWW/ http://packetstormsecurity.com/files/172834/libssh2-1.8.2-Out-Of-Bounds-Read.html https://blog.semmle.com/libssh2-integer-overflow/ https://github.com/libssh2/libssh2/compare/02ecf17...42d37aa https://github.com/libssh2/libssh2/pull/350 https://libssh2.org/changes.html https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E https://lists.debian.org/debian-lts-announce/2019/07/msg00024.html https://lists.debian.org/debian-lts-announce/2021/12/msg00013.html https://lists.debian.org/debian-lts-announce/2023/09/msg00006.html Common Vulnerability Exposure (CVE) ID: CVE-2019-17498 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TY7EEE34RFKCTXTMBQQWWSLXZWSCXNDB/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22H4Q5XMGS3QNSA7OCL3U7UQZ4NXMR5O/ http://packetstormsecurity.com/files/172835/libssh2-1.9.0-Out-Of-Bounds-Read.html https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/ https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498 https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480 https://github.com/libssh2/libssh2/commit/dedcbd106f8e52d5586b0205bc7677e4c9868f9c https://lists.debian.org/debian-lts-announce/2019/11/msg00010.html SuSE Security Announcement: openSUSE-SU-2019:2483 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00026.html Common Vulnerability Exposure (CVE) ID: CVE-2020-22218 https://github.com/libssh2/libssh2/pull/476
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