CVE-2022-3437

Description

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
heimdal	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Ignored end of life, was needed
	22.04 LTS jammy	Vulnerable
	20.04 LTS focal	Fixed 7.7.0+dfsg-1ubuntu1.3
	18.04 LTS bionic	Fixed 7.5.0+dfsg-1ubuntu0.3
	16.04 LTS xenial	Fixed 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3
	14.04 LTS trusty	Fixed 1.6~git20131207+dfsg-1ubuntu1.2+esm3
samba	25.10 questing	Fixed 2:4.17.3+dfsg-3ubuntu1
	25.04 plucky	Fixed 2:4.17.3+dfsg-3ubuntu1
	24.10 oracular	Fixed 2:4.17.3+dfsg-3ubuntu1
	24.04 LTS noble	Fixed 2:4.17.3+dfsg-3ubuntu1
	23.10 mantic	Fixed 2:4.17.3+dfsg-3ubuntu1
	23.04 lunar	Fixed 2:4.17.3+dfsg-3ubuntu1
	22.10 kinetic	Fixed 2:4.16.8+dfsg-0ubuntu1
	22.04 LTS jammy	Fixed 2:4.15.13+dfsg-0ubuntu1
	20.04 LTS focal	Fixed 2:4.15.13+dfsg-0ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm1
	16.04 LTS xenial	Fixed 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm2
	14.04 LTS trusty	Fixed 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm13

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Notes

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.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
heimdal	Upstream: f6edaaf Upstream: c9cc343 Upstream: a587a4b Upstream: c758910 Upstream: 414b2a7 Upstream: be9bbd9 Upstream: c8407ca Upstream: 8fb508a
samba	Upstream: https://git.samba.org/?p=samba.git;a=commit;h=0eaa68d1935236c0a6188ba1ba078db507887e6c Upstream: https://git.samba.org/?p=samba.git;a=commit;h=c5dd87f488820e180649e6fd3597bce4ffa24fdc Upstream: https://git.samba.org/?p=samba.git;a=commit;h=03eefa45d38ca3eade2018767421bb60ba65d58b Upstream: https://git.samba.org/?p=samba.git;a=commit;h=e3c314ed69f99db1c797772fbda83820352d5387 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=9ca9408c5edf807de9fba9f59eabd899c79458a9 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=c944773adc421b3f85a8166fa2d9733e3e9a10c2 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=e1c2e2836efaa895d817b5611bf908284c3d415d Upstream: https://git.samba.org/?p=samba.git;a=commit;h=de77f0159873fb0c569c02cee5aa492af8e3f461 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=d16ac1f4057ec0c26768f04f00c512abf271be7f Upstream: https://git.samba.org/?p=samba.git;a=commit;h=22dd9072c9f964931db931ee0b638a9799e947ca Upstream: https://git.samba.org/?p=samba.git;a=commit;h=5c31d5beb3bed6b28c8d648d889c47e69c16cc8e Upstream: https://git.samba.org/?p=samba.git;a=commit;h=fe1204d9da2c6f761c4dc4421f67057b10eaf430 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=a49a3ac8e082921c2793a073b5991c4693f167ab Upstream: https://git.samba.org/?p=samba.git;a=commit;h=310bffc085514f9ceba5b3501ddef15807c53809 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=c22914f845b3eba1c9ad444333f3d044352b7e2c Upstream: https://git.samba.org/?p=samba.git;a=commit;h=5f6dbf2ab29bcd30c701cab3daecf5a6a53a44cd Upstream: https://git.samba.org/?p=samba.git;a=commit;h=9f6f1e01aca4f00a5d23127803c81939253e0577 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=5a62eb5734d50fe556934aefa3bac5698372f00e Upstream: https://git.samba.org/?p=samba.git;a=commit;h=ebac8bf0478e19849f83af6d44b73d7ab3afd25b Upstream: https://git.samba.org/?p=samba.git;a=commit;h=1aca34515515f2cb00fbf5ad8b9212b319f01836 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=77e0f2febaaf4d6e5e42f8e73a1f8f3c0e4a2985 Upstream: https://git.samba.org/?p=samba.git;a=commit;h=e9db03736007721e37c4fba847ce4aa0c4520924

Package

Patch details

heimdal

Upstream: f6edaaf
Upstream: c9cc343
Upstream: a587a4b
Upstream: c758910
Upstream: 414b2a7
Upstream: be9bbd9
Upstream: c8407ca
Upstream: 8fb508a

samba

Severity score breakdown

Parameter	Value
Base score	4.3 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

USN-5800-1
Heimdal vulnerabilities
12 January 2023

USN-5822-1
Samba vulnerabilities
24 January 2023

USN-5936-1
Samba vulnerabilities
8 March 2023

USN-7582-1
Samba vulnerabilities
19 June 2025

Cvss 3 Severity Score

Description

Status

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Notes

mdeslaur

rodrigo-zaiden

Patch details

Severity score breakdown

References

Related Ubuntu Security Notices (USN)

Other references