CVE-2019-19270

NameCVE-2019-19270
DescriptionAn issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.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)
Debian Bugs946346

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
proftpd-dfsg (PTS)jessie1.3.5-1.1+deb8u2fixed
jessie (security)1.3.5e+r1.3.5-2+deb8u5fixed
stretch1.3.5b-4+deb9u1fixed
stretch (security)1.3.5b-4+deb9u2fixed
buster, buster (security)1.3.6-4+deb10u2vulnerable
bullseye, sid1.3.6b-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
proftpd-dfsgsource(unstable)1.3.6b-2946346
proftpd-dfsgsourcejessie(not affected)
proftpd-dfsgsourcestretch(not affected)

Notes

[buster] - proftpd-dfsg <no-dsa> (Minor issue)
[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/859
https://github.com/proftpd/proftpd/commit/81cc5dce4fc0285629a1b08a07a109af10c208dd (master)
https://github.com/proftpd/proftpd/commit/be8e1687819cb665359bd62b4c896ff4b1a09c3f (1.3.6 branch)
Introduced in: https://github.com/proftpd/proftpd/commit/0e27c53177db6e1ce4196c772c119071678c77a7 (v1.3.5c)

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