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."

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."

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."

Samba is a suite of programs for Linux and Unix to interoperate with Windows.

Security Fix(es):

A vulnerability was found in MIT krb5. This flaw allows an authenticated attacker to cause a KDC or kadmind process to crash by reading beyond the bounds of allocated memory, creating a denial of service. A privileged attacker may similarly be able to cause a Kerberos or GSS application service to crash.(CVE-2022-42898)

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).

Security Fix(es):

• krb5: integer overflow vulnerabilities in PAC parsing (CVE-2022-42898)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).

Security Fix(es):

• krb5: integer overflow vulnerabilities in PAC parsing (CVE-2022-42898)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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."

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).

Security Fix(es):

• krb5: integer overflow vulnerabilities in PAC parsing (CVE-2022-42898)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Kerberos is a network authentication system, which can improve the security of your network by eliminating the insecure practice of sending passwords over the network in unencrypted form. It allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos key distribution center (KDC).

Security Fix(es):

• krb5: integer overflow vulnerabilities in PAC parsing (CVE-2022-42898)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

• CVE-2022-42898: Fix integer overflows in PAC parsing
• A test-suite was enabled

• CVE-2022-42898: Fix integer overflows in PAC parsing
• A test-suite was enabled

• CVE-2022-42898: Fix integer overflows in PAC parsing
• A test-suite was activated

• CVE-2022-42898: Fix integer overflows in PAC parsing
• A test-suite was activated

• SECURITY UPDATE: integer overflows that may lead to remote code execution
  • debian/patches/CVE-2022-42898.patch: add several tests to prevent integer overflow in pac parsing
  • CVE-2022-42898

• SECURITY UPDATE: Integer overflows
  • debian/patches/CVE-2022-42898.patch: fix integer overflows in PAC parsing
  • CVE-2022-42898

• SECURITY UPDATE: use after free in Samba AD DC RPC server
  • debian/patches/CVE-2021-3738-pre.patch: prepare service routines before fixing CVE-2021-3738
  • debian/patches/CVE-2021-3738.patch: avoids a crash caused by use-after-free in Samba AD DC RPC server
  • CVE-2021-3738.patch
• SECURITY UPDATE: integer overflow in PAC parsing
  • debian/patches/CVE-2022-42898.patch: catch overflows that result from adding PAC_INFO_BUFFER_SIZE
  • CVE-2022-42898

• SECURITY UPDATE: integer overflow in PAC parsing
  • debian/patches/CVE-2022-42898.patch: catch overflows that result from adding PAC_INFO_BUFFER_SIZE
  • CVE-2022-42898

• SECURITY UPDATE: DNS string buffer overflow
  • debian/patches/CVE-2020-10745.patch: add input validation to prevent buffer overflows when handling DNS/NBT names with consecutive dots or exceeding RFC 1035 255-byte limit. The fix enforces proper bounds checking and component length validation in ndr_push_dns_string() and ndr_push_nbt_string() functions.
  • CVE-2020-10745
• SECURITY UPDATE: panic in krb5_pac_parse()
  • debian/patches/0001-Additional-fix-for-CVE-2022-42898.patch: check pointer for NULL
  • 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."

Greg Hudson discovered integer overflow flaws in the PAC parsing in krb5, the MIT implementation of Kerberos, which may result in remote code execution (in a KDC, kadmin, or GSS or Kerberos application server process), information exposure (to a cross-realm KDC acting maliciously), or denial of service (KDC or kadmind process crash).

Isaac Boukris reported that the Heimdal KDC before 7.7.1 does not apply delegation_not_allowed (aka not-delegated) user attributes for S4U2Self. Instead the forwardable flag is set even if the impersonated client has the not-delegated flag set. (CVE-2019-14870)

Joseph Sutton discovered that the Heimdal KDC before 7.7.1 does not check for missing sname in TGS-REQ (Ticket Granting Server Request) before dereferencing. An authenticated user could use this flaw to crash the KDC. (CVE-2021-3671)

It was discovered that Heimdal is prone to a NULL dereference in acceptors when the initial SPNEGO token has no acceptable mechanisms, which may result in denial of service for a server application that uses the Simple and Protected GSSAPI Negotiation Mechanism (SPNEGO). (CVE-2021-44758)

Evgeny Legerov reported that the DES and Triple-DES decryption routines in the Heimdal GSSAPI library before 7.7.1 were prone to buffer overflow on malloc() allocated memory when presented with a maliciously small packet. In addition, the Triple-DES and RC4 (arcfour) decryption routine were prone to non-constant time leaks, which could potentially yield to a leak of secret key material when using these ciphers. (CVE-2022-3437)

It was discovered that Heimdal's PKI certificate validation library before 7.7.1 can under some circumstances perform an out-of-bounds memory access when normalizing Unicode, which may result in denial of service. (CVE-2022-41916)

Greg Hudson discovered an integer multiplication overflow in the Privilege Attribute Certificate (PAC) parsing routine, which may result in denial of service for Heimdal KDCs and possibly Heimdal servers (e.g., via GSS-API) on 32-bit systems. (CVE-2022-42898)

Douglas Bagnall and the Heimdal maintainers independently discovered that Heimdal's ASN.1 compiler before 7.7.1 generates code that allows specially crafted DER encodings of CHOICEs to invoke the wrong free() function on the decoded structure upon decode error, which may result in remote code execution in the Heimdal KDC and possibly the Kerberos client, the X.509 library, and other components as well. (CVE-2022-44640)

There is a limited write heap buffer overflow in the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal (included in Samba). Some SMB1 write requests were not correctly range checked to ensure the client had sent enough data to fulfill the write, allowing server memory contents to be written into the file (or printer) instead of client supplied data. The client cannot control the area of the server memory that is written to the file (or printer) (CVE-2022-3437)

A symlink following vulnerability was found in Samba, where a user can create a symbolic link that will make 'smbd' escape the configured share path. This flaw allows a remote user with access to the exported part of the file system under a share via SMB1 unix extensions or NFS to create symlinks to files outside the 'smbd' configured share path and gain access to another restricted server's filesystem. (CVE-2022-3592)

Active directory elevation of privilege vulnerability (CVE-2022-37966)

Active directory elevation of privilege vulnerability (CVE-2022-37967)

A flaw was found in samba. The Netlogon RPC implementations may use the rc4-hmac encryption algorithm, which is considered weak and should be avoided even if the client supports more modern encryption types. This issue could allow an attacker who knows the plain text content communicated between the samba client and server to craft data with the same MD5 calculation and replace it without being detected. (CVE-2022-38023)

Active directory integer overflow (CVE-2022-42898)

Active directory can be forced to issue weak rc4-hmac encrypted tickets (CVE-2022-45141)

This update for libheimdal fixes the following issues:

Update to version 7.8.0

• CVE-2022-42898 PAC parse integer overflows
• CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour
• CVE-2022-41916 Fix Unicode normalization read of 1 bytes past end of array
• CVE-2021-44758 A null pointer de-reference DoS in SPNEGO acceptors
• CVE-2021-3671 A null pointer de-reference when handling missing sname in TGS-REQ
• CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec
• CVE-2019-14870: Validate client attributes in protocol-transition

This update for libheimdal fixes the following issues:

Update to version 7.8.0

• CVE-2022-42898 PAC parse integer overflows
• CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour
• CVE-2022-41916 Fix Unicode normalization read of 1 bytes past end of array
• CVE-2021-44758 A null pointer de-reference DoS in SPNEGO acceptors
• CVE-2021-3671 A null pointer de-reference when handling missing sname in TGS-REQ
• CVE-2022-44640 Heimdal KDC: invalid free in ASN.1 codec
• CVE-2019-14870: Validate client attributes in protocol-transition

These are all security issues fixed in the krb5-1.20.1-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the ctdb-4.17.3+git.279.ff9bb8a298-1.1 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the libasn1-8-7.8.0-1.1 package on the GA media of openSUSE Tumbleweed.

This update for krb5 fixes the following issues:

• CVE-2022-42898: Fixed integer overflow in PAC parsing (bsc#1205126).

This update for krb5 fixes the following issues:

• CVE-2021-37750: Fixed KDC null pointer dereference via a FAST inner body that lacks a server field (bsc#1189929).
• CVE-2022-42898: Fixed integer overflow in PAC parsing (bsc#1205126).

This update for krb5 fixes the following issues:

• CVE-2022-42898: Fixed integer overflow in PAC parsing (bsc#1205126).

This update for krb5 fixes the following issues:

• CVE-2022-42898: Fixed integer overflow in PAC parsing (bsc#1205126).