CVE-2018-16841 — Use After Free in Samba

CWE-416 — Use After FreeCWE-415 — Double Free10 documents7 sources
Severity
6.5MEDIUMNVD
EPSS
7.1%
top 8.45%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
SambaDebian SambaCanonical Ubuntu Linux+1 more
Timeline
PublishedNov 28
Latest updateMay 13

Description

Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), term…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶NVDsamba/samba4.3.0 — 4.7.12+2
▶debiandebian/samba< samba 2:4.9.2+dfsg-2 (bookworm)
▶Debiansamba/samba< 2:4.9.2+dfsg-2+3
▶Ubuntusamba/samba< 2:4.3.11+dfsg-0ubuntu0.14.04.19+2

Also affects: Debian Linux 9.0, Ubuntu Linux 12.04, 14.04, 16.04, 18.04, 18.10

Patches

Patch: www.samba.org ↗Patch: www.samba.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-q3v8-mj9m-2wq4: Samba from version 4↗2022-05-13
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OSV
CVE-2018-16841: Samba from version 4↗2018-11-28
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OSV
samba vulnerabilities↗2018-11-27
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📋Vendor Advisories

4
Red Hat
samba: Double-free in Samba AD DC KDC with PKINIT↗2018-11-28
▶
Ubuntu
Samba vulnerabilities↗2018-11-27
▶
Ubuntu
Samba vulnerabilities↗2018-11-27
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Debian
CVE-2018-16841: samba - Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnera...↗2018
▶

💬Community

2
Bugzilla
CVE-2018-16841 samba: Double-free in Samba AD DC KDC with PKINIT [fedora-all]↗2018-11-28
▶
Bugzilla
CVE-2018-16841 samba: Double-free in Samba AD DC KDC with PKINIT↗2018-10-24
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