Bug 1875675 (CVE-2020-25125) - CVE-2020-25125 gnupg: AEAD preference list overflow
Summary: CVE-2020-25125 gnupg: AEAD preference list overflow
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-25125
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1875676
TreeView+ depends on / blocked
 
Reported: 2020-09-04 03:41 UTC by Huzaifa S. Sidhpurwala
Modified: 2021-02-16 19:23 UTC (History)
6 users (show)

Fixed In Version: gnupg 2.2.23
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Environment:
Last Closed: 2020-09-04 14:37:17 UTC
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Description Huzaifa S. Sidhpurwala 2020-09-04 03:41:53 UTC 
As per upstream report:

Importing a key with AEAD preferences with GnuPG 2.2 can lead to an array overflow. This is not trivial to exploit because the attacker can control only each second byte with the first byte being fixed at 0x04. But it can be exploited.

Affected versions are GnuPG 2.2.21 and 2.2.22. GnuPG 2.3 and versions before 2.2.21 are not affected.
Comment 1 Huzaifa S. Sidhpurwala 2020-09-04 14:29:06 UTC 
External References:

https://lists.gnupg.org/pipermail/gnupg-announce/2020q3/000448.html
https://dev.gnupg.org/T5050
https://bugzilla.opensuse.org/show_bug.cgi?id=1176034
Comment 2 Huzaifa S. Sidhpurwala 2020-09-04 14:32:03 UTC 
Upstream patch: https://dev.gnupg.org/rGaeb8272ca8aad403a4baac33b8d5673719cfd8f0
Comment 3 Huzaifa S. Sidhpurwala 2020-09-04 14:32:08 UTC 
Acknowledgments:

Name: the GnuPG project
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