CVE-2017-12151

A flaw was found in the way samba client before samba 4.4.16, samba 4.5.14 and samba 4.6.8 used encryption with the max protocol set as SMB3. The connection could lose the requirement for signing and encrypting to any DFS redirects, allowing an attacker to read or alter the contents of the connection via a man-in-the-middle attack.

A flaw was found in the way samba client before samba 4.4.16, samba 4.5.14 and samba 4.6.8 used encryption with the max protocol set as SMB3. The connection could lose the requirement for signing and encrypting to any DFS redirects, allowing an attacker to read or alter the contents of the connection via a man-in-the-middle attack.

Updated samba packages fix security vulnerabilities:

Stefan Metzmacher discovered that Samba incorrectly enforced SMB signing in certain situations. A remote attacker could use this issue to perform a man in the middle attack. (CVE-2017-12150)

Stefan Metzmacher discovered that Samba incorrectly handled encryption across DFS redirects. A remote attacker could use this issue to perform a man in the middle attack. (CVE-2017-12151)

Yihan Lian and Zhibin Hu discovered that Samba incorrectly handled memory when SMB1 is being used. A remote attacker could possibly use this issue to obtain server memory contents. (CVE-2017-12163)

Yihan Lian and Zhibin Hu discovered that Samba incorrectly handled memory when processing certain SMB1 requests. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2017-14746)

Volker Lendecke discovered that Samba incorrectly cleared memory when returning data to a client. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2017-15275)

The samba package has been updated to version 4.6.12 to fix these issues and other bugs.

Also, the talloc package has been updated to 2.1.10 and the tevent package has been updated to 0.9.34, as they were needed by the updated samba.

These are all security issues fixed in the ctdb-4.14.6+git.182.2205d5224e3-1.1 package on the GA media of openSUSE Tumbleweed.

This update for samba fixes several issues.

These security issues were fixed:

• CVE-2017-12163: Prevent client short SMB1 write from writing server memory to file, leaking information from the server to the client (bsc#1058624).
• CVE-2017-12150: Always enforce smb signing when it is configured (bsc#1058622).
• CVE-2017-12151: Keep required encryption across SMB3 dfs redirects (bsc#1058565).

These non-security issues were fixed:

• Fixed error where short name length was read as 2 bytes, should be 1 (bsc#1042419)
• Fixed GUID string format on GetPrinter to prevent published printers from disappearing 7 (bsc#1050707).
• Halt endless forest trust scan to prevent winbind from running out of memory (bsc#1044084).

This update for samba fixes several issues.

These security issues were fixed:

• CVE-2017-12163: Prevent client short SMB1 write from writing server memory to file, leaking information from the server to the client (bsc#1058624)
• CVE-2017-12150: Always enforce smb signing when it is configured (bsc#1058622)
• CVE-2017-12151: Keep required encryption across SMB3 dfs redirects (bsc#1058565)

The following non-security issue was fixed:

• Fix GUID string format on GetPrinter info request. (bsc#1050707)

This update for samba fixes several issues.

These security issues were fixed:

• CVE-2017-12163: Prevent client short SMB1 write from writing server memory to file, leaking information from the server to the client (bsc#1058624).
• CVE-2017-12150: Always enforce smb signing when it is configured (bsc#1058622).
• CVE-2017-12151: Keep required encryption across SMB3 dfs redirects (bsc#1058565).

These non-security issues were fixed:

• Fixed error where short name length was read as 2 bytes, should be 1 (bsc#1042419)

This update for samba fixes several issues.

These security issues were fixed:

• CVE-2017-12163: Prevent client short SMB1 write from writing server memory to file, leaking information from the server to the client (bsc#1058624).
• CVE-2017-12150: Always enforce smb signing when it is configured (bsc#1058622).
• CVE-2017-12151: Keep required encryption across SMB3 dfs redirects (bsc#1058565).

This non-security issue was fixed:

• Fix error where short name length was read as 2 bytes, should be 1 (bsc#1042419)

This update for samba fixes several issues.

These security issues were fixed:

• CVE-2017-12163: Prevent client short SMB1 write from writing server memory to file, leaking information from the server to the client (bsc#1058624).
• CVE-2017-12150: Always enforce smb signing when it is configured (bsc#1058622).
• CVE-2017-12151: Keep required encryption across SMB3 dfs redirects (bsc#1058565).

This non-security issue was fixed:

• Fix error where short name length was read as 2 bytes, should be 1 (bsc#1042419)

This update for samba fixes the following issues:

Security issues fixed:

• CVE-2017-14746: Use-after-free vulnerability (bsc#1060427).
• CVE-2017-15275: Server heap memory information leak (bsc#1063008).
• CVE-2017-12163: Prevent client short SMB1 write from writing server memory to file (bsc#1058624).
• CVE-2017-12151: Keep required encryption across SMB3 dfs redirects (bsc#1058565).
• CVE-2017-12150: Some code path don't enforce smb signing when they should (bsc#1058565).

Bug fixes:

• Samba was updated to 4.6.9 (bsc#1065066) see release notes for details.
  • https://www.samba.org/samba/history/samba-4.6.9.html

Stefan Metzmacher discovered that Samba incorrectly enforced SMB signing in certain situations. A remote attacker could use this issue to perform a machine-in-the-middle attack. (CVE-2017-12150)

Stefan Metzmacher discovered that Samba incorrectly handled encryption across DFS redirects. A remote attacker could use this issue to perform a machine-in-the-middle attack. (CVE-2017-12151)

Yihan Lian and Zhibin Hu discovered that Samba incorrectly handled memory when SMB1 is being used. A remote attacker could possibly use this issue to obtain server memory contents. (CVE-2017-12163)