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FreeBSD: VID-7A8B6170-A889-11ED-BBAE-6CC21735F730 (CVE-2022-41862): PostgreSQL server -- Client memory disclosure when connecting, with Kerberos, to modified server.

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FreeBSD: VID-7A8B6170-A889-11ED-BBAE-6CC21735F730 (CVE-2022-41862): PostgreSQL server -- Client memory disclosure when connecting, with Kerberos, to modified server.

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/09/2023
Created
02/14/2023
Added
02/10/2023
Modified
03/16/2023

Description

Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.

From VID-7A8B6170-A889-11ED-BBAE-6CC21735F730:

PostgreSQL Project reports:

A modified, unauthenticated server can send an

unterminated string during the establishment of Kerberos

transport encryption. When a libpq client application

has a Kerberos credential cache and doesn't explicitly

disable option gssencmode, a server can cause libpq to

over-read and report an error message containing

uninitialized bytes from and following its receive

buffer. If libpq's caller somehow makes that message

accessible to the attacker, this achieves a disclosure

of the over-read bytes. We have not confirmed or ruled

out viability of attacks that arrange for a crash or for

presence of notable, confidential information in

disclosed bytes.

Solution(s)

  • freebsd-upgrade-package-postgresql12-client
  • freebsd-upgrade-package-postgresql13-client
  • freebsd-upgrade-package-postgresql14-client
  • freebsd-upgrade-package-postgresql15-client

References

  • CVE-2022-41862

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