There are 18 open security issues in bullseye.
12 important issues:
- CVE-2022-3437:
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.
- CVE-2023-0225:
A flaw was found in Samba. An incomplete access check on dnsHostName allows authenticated but otherwise unprivileged users to delete this attribute from any object in the directory.
- CVE-2023-0614:
The fix in 4.6.16, 4.7.9, 4.8.4 and 4.9.7 for CVE-2018-10919 Confidential attribute disclosure vi LDAP filters was insufficient and an attacker may be able to obtain confidential BitLocker recovery keys from a Samba AD DC.
- CVE-2023-0922:
The Samba AD DC administration tool, when operating against a remote LDAP server, will by default send new or reset passwords over a signed-only connection.
- CVE-2020-25720:
- CVE-2021-20251:
A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.
- CVE-2022-37966:
Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability
- CVE-2022-37967:
Windows Kerberos Elevation of Privilege Vulnerability
- CVE-2022-38023:
Netlogon RPC Elevation of Privilege Vulnerability
- CVE-2022-42898:
PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."
- CVE-2022-44640:
Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distribution Center (KDC).
- CVE-2022-45141:
Since the Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability was disclosed by Microsoft on Nov 8 2022 and per RFC8429 it is assumed that rc4-hmac is weak, Vulnerable Samba Active Directory DCs will issue rc4-hmac encrypted tickets despite the target server supporting better encryption (eg aes256-cts-hmac-sha1-96).
4 issues left for the package maintainer to handle:
- CVE-2021-3670:
(needs triaging)
MaxQueryDuration not honoured in Samba AD DC LDAP
- CVE-2022-1615:
(postponed; to be fixed through a stable update)
In Samba, GnuTLS gnutls_rnd() can fail and give predictable random values.
- CVE-2018-14628:
(postponed; to be fixed through a stable update)
An information leak vulnerability was discovered in Samba's LDAP server. Due to missing access control checks, an authenticated but unprivileged attacker could discover the names and preserved attributes of deleted objects in the LDAP store.
- CVE-2022-32743:
(needs triaging)
Samba does not validate the Validated-DNS-Host-Name right for the dNSHostName attribute which could permit unprivileged users to write it.
You can find information about how to handle these issues in the security team's documentation.
2 ignored issues:
- CVE-2021-20316:
A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share.
- CVE-2021-44141:
All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to determine if a file or directory exists in an area of the server file system not exported under the share definition. SMB1 with unix extensions has to be enabled in order for this attack to succeed.
![[bug history graph]](https://qa.debian.org/data/bts/graphs/s/samba.png){kind=link}