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CVE-2022-3437

Published: 27 October 2022

A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.

Notes

AuthorNote
mdeslaur
The focal samba update was temporarily reverted by USN 5822-2
because it introduced regressions. It was later updated again
with USN 5936-1.
rodrigo-zaiden
heimdal patch f6edaafc introduced a new issue, assigned as
CVE-2022-45142.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
heimdal
Launchpad, Ubuntu, Debian
lunar Not vulnerable
(7.8.git20221117.28daf24+dfsg-1ubuntu1)
kinetic Ignored
(end of life, was needed)
upstream
Released (7.7.1, 7.8, 7.8.git20221115.a6cf945+dfsg-1)
bionic
Released (7.5.0+dfsg-1ubuntu0.3)
jammy Needed

focal
Released (7.7.0+dfsg-1ubuntu1.3)
trusty
Released (1.6~git20131207+dfsg-1ubuntu1.2+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Patches:
upstream: https://github.com/heimdal/heimdal/commit/f6edaafcfefd843ca1b1a041f942a853d85ee7c3 (heimdal-7.7.1)
upstream: https://github.com/heimdal/heimdal/commit/c9cc34334bd64b08fe91a2f720262462e9f6bb49 (heimdal-7.7.1)
upstream: https://github.com/heimdal/heimdal/commit/a587a4bcb28d5b9047f332573b1e7c8f89ca3edd (heimdal-7.7.1)
upstream: https://github.com/heimdal/heimdal/commit/c758910eaad3c0de2cfb68830a661c4739675a7d (heimdal-7.7.1)
upstream: https://github.com/heimdal/heimdal/commit/414b2a77fd61c26d64562e3800dc5578d9d0f15d (heimdal-7.7.1)
upstream: https://github.com/heimdal/heimdal/commit/be9bbd93ed8f204b4bc1b92d1bc3c16aac194696 (heimdal-7.7.1)
upstream: https://github.com/heimdal/heimdal/commit/c8407ca079294d76a5ed140ba5b546f870d23ed2 (heimdal-7.7.1)
upstream: https://github.com/heimdal/heimdal/commit/8fb508a25a6a47289c73e3f4339352a73a396eef (heimdal-7.7.1)






















Binaries built from this source package are in Universe and so are supported by the community.
samba
Launchpad, Ubuntu, Debian
jammy
Released (2:4.15.13+dfsg-0ubuntu1)
kinetic
Released (2:4.16.8+dfsg-0ubuntu1)
lunar
Released (2:4.17.3+dfsg-3ubuntu1)
trusty Needs triage

xenial Needs triage

upstream
Released (2:4.16.6+dfsg-1,4.15.11,4.16.6,4.17.2)
bionic Needed

focal
Released (2:4.15.13+dfsg-0ubuntu0.20.04.1)
Patches:








upstream: https://git.samba.org/?p=samba.git;a=commit;h=0eaa68d1935236c0a6188ba1ba078db507887e6c (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=c5dd87f488820e180649e6fd3597bce4ffa24fdc (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=03eefa45d38ca3eade2018767421bb60ba65d58b (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=e3c314ed69f99db1c797772fbda83820352d5387 (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=9ca9408c5edf807de9fba9f59eabd899c79458a9 (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=c944773adc421b3f85a8166fa2d9733e3e9a10c2 (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=e1c2e2836efaa895d817b5611bf908284c3d415d (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=de77f0159873fb0c569c02cee5aa492af8e3f461 (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=d16ac1f4057ec0c26768f04f00c512abf271be7f (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=22dd9072c9f964931db931ee0b638a9799e947ca (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=5c31d5beb3bed6b28c8d648d889c47e69c16cc8e (4.16.6)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=fe1204d9da2c6f761c4dc4421f67057b10eaf430 (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=a49a3ac8e082921c2793a073b5991c4693f167ab (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=310bffc085514f9ceba5b3501ddef15807c53809 (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=c22914f845b3eba1c9ad444333f3d044352b7e2c (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=5f6dbf2ab29bcd30c701cab3daecf5a6a53a44cd (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=9f6f1e01aca4f00a5d23127803c81939253e0577 (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=5a62eb5734d50fe556934aefa3bac5698372f00e (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=ebac8bf0478e19849f83af6d44b73d7ab3afd25b (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=1aca34515515f2cb00fbf5ad8b9212b319f01836 (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=77e0f2febaaf4d6e5e42f8e73a1f8f3c0e4a2985 (4.15.11)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=e9db03736007721e37c4fba847ce4aa0c4520924 (4.15.11)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H