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Debian Bullseye DSA-5409-1 Critical: Libssh Denial Of Service

debian
Calendar Grey May 23, 2023
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Recent discoveries in libssh have identified two vulnerabilities that necessitate immediate upgrades to mitigate risks related to service interruption and authentication breakdowns.
Two security issues have been discovered in libssh, a tiny C SSH library: CVE-2023-1667
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Topics Covered

security advisory denial of service Debian authentication issue libssh

Summary

Two security issues have been discovered in libssh, a tiny C SSH library:

CVE-2023-1667

Philip Turnbull discovered a NULL pointer dereference which could
result in denial of service.

CVE-2023-2283

Kevin Backhouse discovered that pki_verify_data_signature() may
fail to correctly validate authentication in memory pressure
situations.

For the stable distribution (bullseye), these problems have been fixed in
version 0.9.7-0+deb11u1.

We recommend that you upgrade your libssh packages.

For the detailed security status of libssh please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libssh

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/



Severity
critical
Lowest
Low
Medium
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Critical

Package: libssh
CVE ID: CVE-2023-1667 CVE-2023-2283

Topics%20covered

Topics Covered

security advisory denial of service Debian authentication issue libssh

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