CVE-2019-19271

NameCVE-2019-19271
DescriptionAn issue was discovered in tls_verify_crl in ProFTPD before 1.3.6. A wrong iteration variable, used when checking a client certificate against CRL entries (installed by a system administrator), can cause some CRL entries to be ignored, and can allow clients whose certificates have been revoked to proceed with a connection to the server.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
proftpd-dfsg (PTS)stretch1.3.5b-4+deb9u5fixed
stretch (security)1.3.5e+r1.3.5b-4+deb9u2fixed
buster1.3.6-4+deb10u5fixed
buster (security)1.3.6-4+deb10u4fixed
bullseye, sid1.3.7a-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
proftpd-dfsgsourcejessie(not affected)
proftpd-dfsgsourcestretch(not affected)
proftpd-dfsgsource(unstable)1.3.6-1

Notes

[stretch] - proftpd-dfsg <not-affected> (Bug was introduced in 1.3.5c)
[jessie] - proftpd-dfsg <not-affected> (Bug was introduced in 1.3.5c)
https://github.com/proftpd/proftpd/issues/860
Introduced in: https://github.com/proftpd/proftpd/commit/474075d2cb8c8ced7764b1b4b5ad63a49284d61f (v1.3.5c)

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