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Slackware 15.0: 2025-175-01 critical: libssh memory safety issues

slackware
Calendar Grey June 24, 2025
Dist Slackware Esm H88
Recent libssh updates for Slackware address severe vulnerabilities affecting remote connectivity. Installing these updates is advised to ensure security.
New libssh packages are available for Slackware 15.0 and -current to fix security issues

Summary

Here are the details from the Slackware 15.0 ChangeLog: patches/packages/libssh-0.11.2-i586-1_slack15.0.txz: Upgraded. This update fixes security issues: Write beyond bounds in binary to base64 conversion. Use of uninitialized variable in privatekey_from_file(). Likely read beyond bounds in sftp server handle management. Double free in functions exporting keys. ssh_kdf() returns a success code on certain failures. Likely read beyond bounds in sftp server message decoding. Invalid return code for chacha20 poly1305 with OpenSSL. For more information, see: https://www.cve.org/CVERecord?id=CVE-2025-4877 https://www.cve.org/CVERecord?id=CVE-2025-4878 https://www.cve.org/CVERecord?id=CVE-2025-5318 https://www.cve.org/CVERecord?id=CVE-2025-5351 https://www.cve.org/CVERecord?id=CVE-2025-5372 https://www.cve.org/CVERecord?id=CVE-2025-5449 https://www.cve.org/CVERecord?id=CVE-2025-5987 (* Security fix *)

Topics%20covered

Topics Covered

security advisory critical remote access slackware memory safety libssh

Where Find New Packages

Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating FTP and rsync hosting to the Slackware project! :-)
Also see the "Get Slack" section on http://www.slackware.com/ for additional mirror sites near you.
Updated package for Slackware 15.0: ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/libssh-0.11.2-i586-1_slack15.0.txz
Updated package for Slackware x86_64 15.0: ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/libssh-0.11.2-x86_64-1_slack15.0.txz
Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libssh-0.11.2-i686-1.txz
Updated package for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/libssh-0.11.2-x86_64-1.txz

MD5 Signatures

Slackware 15.0 package: 14b77cf890efc0510973e11c8915e5dc libssh-0.11.2-i586-1_slack15.0.txz
Slackware x86_64 15.0 package: ea821028e9558cf5e5d03150e3301712 libssh-0.11.2-x86_64-1_slack15.0.txz
Slackware -current package: 73a5d112c67b504ceaebd3aeb516d514 l/libssh-0.11.2-i686-1.txz
Slackware x86_64 -current package: ee7348abd23222070612485eb8549553 l/libssh-0.11.2-x86_64-1.txz

Severity
critical
Lowest
Low
Medium
High
Critical

Topics%20covered

Topics Covered

security advisory critical remote access slackware memory safety libssh

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Installation Instructions

Installation instructions: Upgrade the package as root: # upgradepkg libssh-0.11.2-i586-1_slack15.0.txz

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