CVE-2019-6690

NameCVE-2019-6690
Descriptionpython-gnupg 0.4.3 allows context-dependent attackers to trick gnupg to decrypt other ciphertext than intended. To perform the attack, the passphrase to gnupg must be controlled by the adversary and the ciphertext should be trusted. Related to a "CWE-20: Improper Input Validation" issue affecting the affect functionality component.
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)
ReferencesDLA-1675-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python-gnupg (PTS)jessie0.3.6-1vulnerable
jessie (security)0.3.6-1+deb8u1fixed
stretch0.3.9-1vulnerable
buster, sid0.4.4-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python-gnupgsource(unstable)0.4.4-1medium
python-gnupgsourcejessie0.3.6-1+deb8u1mediumDLA-1675-1

Notes

[stretch] - python-gnupg <no-dsa> (Minor issue)
https://github.com/stigtsp/CVE-2019-6690-python-gnupg-vulnerability
https://github.com/vsajip/python-gnupg/commit/39eca266dd837e2ad89c94eb17b7a6f50b25e7cf#diff-88b99bb28683bd5b7e3a204826ead112
https://github.com/vsajip/python-gnupg/commit/3003b654ca1c29b0510a54b9848571b3ad57df19#diff-88b99bb28683bd5b7e3a204826ead112

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