CVE-2019-17455
published 2019-10-10CVE-2019-17455: Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as…
PriorityP347critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
3.11%
86.3th percentile
Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | libntlm | < libntlm 1.6-1 (bookworm) | libntlm 1.6-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| msrc | cbl2_libntlm_1.6-1_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| nongnu | libntlm | <= 1.5 | — |
| nongnu | libntlm | >= 0 < 1.6-1 | 1.6-1 |
| nongnu | libntlm | >= 0 < 1.6-1 | 1.6-1 |
| nongnu | libntlm | >= 0 < 1.6-1 | 1.6-1 |
| nongnu | libntlm | >= 0 < 1.6-1 | 1.6-1 |
| opensuse | backports_sle | — | — |
| opensuse | leap | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_msrc9.8CRITICAL
vendor_redhat9.8CRITICAL
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Ubuntu
Libntlm vulnerability
vendor_ubuntu·2022-02-15
CVE-2019-17455 Libntlm vulnerability
Title: Libntlm vulnerability
Summary: Libntlm could be made to crash or possibly execute arbitrary code.
USN-5108-1 fixed a vulnerability in Libntlm.
This update provides the corresponding update for Ubuntu 14.04 ESM and
Ubuntu 16.04 ESM.
Original advisory details:
It was discovered that Libntlm incorrectly handled specially crafted NTML
requests. An attacker could possibly use this issue to cause a denial of
service or another unspecified impact.
Instructions: In general, a standard system update will make all the necessary changes.
Ubuntu
libntlm vulnerability
vendor_ubuntu·2021-10-08
CVE-2019-17455 libntlm vulnerability
Title: libntlm vulnerability
Summary: libntlm could be made to crash or possibly execute arbitrary code.
It was discovered that Libntlm incorrectly handled specially crafted NTML
requests. An attacker could possibly use this issue to cause a denial of
service or another unspecified impact.
Instructions: In general, a standard system update will make all the necessary changes.
Microsoft
Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest tSmbNtlmAuthChallenge and tSmbNtlmAuthResponse read and write operations as demonstrated by a stack-based buffer over-read in
vendor_msrc·2019-10-08·CVSS 9.8
CVE-2019-17455 [CRITICAL] CWE-125 Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest tSmbNtlmAuthChallenge and tSmbNtlmAuthResponse read and write operations as demonstrated by a stack-based buffer over-read in
Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest tSmbNtlmAuthChallenge and tSmbNtlmAuthResponse read and write operations as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If
Red Hat
libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c
vendor_redhat·2019-10-08·CVSS 9.8
CVE-2019-17455 [CRITICAL] CWE-119 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c
libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c
Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
A flaw was found in the libntlm NTLM library where it was vulnerable to a buffer overflow in the buildSmbNtlmAuthRequest_userlen() function. If an application using this library does not check input length before calling the function, an attacker could use this flaw to send a specially crafted request that could crash the application, or possibly trigger code execution.
Statement: The vulnerability is rated Medium because no package in Red Hat Ente
Debian
CVE-2019-17455: libntlm - Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbN...
vendor_debian·2019·CVSS 9.8
CVE-2019-17455 [CRITICAL] CVE-2019-17455: libntlm - Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbN...
Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
Scope: local
bookworm: resolved (fixed in 1.6-1)
bullseye: resolved (fixed in 1.6-1)
forky: resolved (fixed in 1.6-1)
sid: resolved (fixed in 1.6-1)
trixie: resolved (fixed in 1.6-1)
GHSA
GHSA-m8c7-4hj3-f3m6: Libntlm through 1
ghsa_unreviewed·2022-05-24
CVE-2019-17455 [HIGH] CWE-120 GHSA-m8c7-4hj3-f3m6: Libntlm through 1
Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
OSV
CVE-2019-17455: Libntlm through 1
osv·2019-10-10·CVSS 9.8
CVE-2019-17455 [CRITICAL] CVE-2019-17455: Libntlm through 1
Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c
bugzilla·2019-11-04·CVSS 9.8
CVE-2019-17455 [CRITICAL] CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c
CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c
Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.
Reference:
https://gitlab.com/jas/libntlm/issues/2
Discussion:
Created libntlm tracking bugs for this issue:
Affects: epel-7 [bug 1768465]
Affects: fedora-all [bug 1768464]
---
Mitigation:
The calling application must verify that the input username and domain fit in the 1024 byte buffer.
---
Statement:
The vulnerability is rated Medium because no package in Red Hat Enterprise Linux versions 6 and 7 is using Libntlm. Most 3rd
Bugzilla
CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c [epel-7]
bugzilla·2019-11-04·CVSS 9.8
CVE-2019-17455 [CRITICAL] CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c [epel-7]
CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c [epel-7]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of epel-7.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
Discussion:
Use the following te
Bugzilla
CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c [fedora-all]
bugzilla·2019-11-04·CVSS 9.8
CVE-2019-17455 [CRITICAL] CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c [fedora-all]
CVE-2019-17455 libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects
Bugzilla
CVE-2019-15215 kernel: use after free in drivers/media/usb/cpia2/cpia2_usb.c driver
bugzilla·2019-08-26·CVSS 4.6
CVE-2019-15215 [MEDIUM] CVE-2019-15215 kernel: use after free in drivers/media/usb/cpia2/cpia2_usb.c driver
CVE-2019-15215 kernel: use after free in drivers/media/usb/cpia2/cpia2_usb.c driver
A vulnerability was found in the Linux kernel. There is a use-after-free caused by a malicious USB device in the drivers/media/usb/cpia2/cpia2_usb.c driver. The attacker must have physical access to trigger the disconnect() functionality which is required to trigger this flaw and a local account to take advantage of the use-after-free memory condition.
Reference:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.6
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eff73de2b1600ad8230692f00bc0ab49b166512a
https://syzkaller.appspot.com/bug?id=b68d3c254cf294f8a802582094fa3251d6de5247
Discussion:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 17455
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.htmlhttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145https://gitlab.com/jas/libntlm/issues/2https://lists.debian.org/debian-lts-announce/2020/05/msg00010.htmlhttps://lists.debian.org/debian-lts-announce/2021/11/msg00026.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.htmlhttps://security-tracker.debian.org/tracker/CVE-2019-17455http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00029.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-06/msg00032.htmlhttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=942145https://gitlab.com/jas/libntlm/issues/2https://lists.debian.org/debian-lts-announce/2020/05/msg00010.htmlhttps://lists.debian.org/debian-lts-announce/2021/11/msg00026.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BVFO3OVJPMSGIXBKNOCVOJZ3UTGZQF5/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YZ5YWYNOJ5HMCKAHWLTY4MXZQWJJCBI7/https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-17455.htmlhttps://security-tracker.debian.org/tracker/CVE-2019-17455
2019-10-10
Published