Ubuntu Security Notice 3675-3 - USN-3675-1 fixed a vulnerability in GnuPG. This update provides the corresponding update for Ubuntu 12.04 ESM. Marcus Brinkmann discovered that during decryption or verification, GnuPG did not properly filter out terminal sequences when reporting the original filename. An attacker could use this to specially craft a file that would cause an application parsing GnuPG output to incorrectly interpret the status of the cryptographic operation reported by GnuPG. Various other issues were also addressed.
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Ubuntu Security Notice USN-3675-3
June 18, 2018
gnupg vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
GnuPG could be made to incorrectly interpret the status of the
cryptographic operation if it received specially crafted file.
Software Description:
- gnupg: GNU privacy guard - a free PGP replacement
Details:
USN-3675-1 fixed a vulnerability in GnuPG. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
Marcus Brinkmann discovered that during decryption or verification,
GnuPG did not properly filter out terminal sequences when reporting
the original filename. An attacker could use this to specially craft a
file that would cause an application parsing GnuPG output to
incorrectly interpret the status of the cryptographic operation
reported by GnuPG. (CVE-2018-12020)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
gnupg 1.4.11-3ubuntu2.11
In general, a standard system update will make all the necessary
changes.
References:
https://usn.ubuntu.com/usn/usn-3675-3
https://usn.ubuntu.com/usn/usn-3675-1
CVE-2018-12020