SB2022092221 - Multiple vulnerabilities in Dell NetWorker vProxy

Description

This security bulletin contains information about 19 secuirty vulnerabilities.

1) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2022-29900)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a mistrained branch predictions for return instructions. A local user can execute arbitrary speculative code under certain microarchitecture-dependent conditions. The vulnerability was dubbed  RETbleed.

2) Heap-based buffer overflow (CVE-ID: CVE-2022-24903)

The vulnerability allows a remote attacker to perform a denial of service or potentially execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when parsing data in imtcp, imptcp, imgssapi, and imhttp modules used for TCP syslog reception. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and cause a denial of service or potentially execute arbitrary code on the target system.

Successful exploitation of this vulnerability is possible if the attacker is able to directly send specially crafted messages to the rsyslog daemon or by injecting specially crafted data into log files. Vulnerability exploitation in the second scenario requires that the rsyslog client supports octet-counted framing, which is not a default configuration.

3) Missing Encryption of Sensitive Data (CVE-ID: CVE-2022-2097)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to an error in AES OCB mode for 32-bit x86 platforms using the AES-NI assembly optimized implementation. Under specific circumstances OpenSSL does not encrypt the entire message and can reveal sixteen bytes of data that was preexisting in the memory that wasn't written. A remote attacker can gain access to potentially sensitive information.

4) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2022-32208)

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper handling of message verification failures when performing FTP transfers secured by krb5. A remote attacker can perform MitM attack and manipulate data.

5) Resource exhaustion (CVE-ID: CVE-2022-32206)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insecure processing of compressed HTTP responses. A malicious server can send a specially crafted HTTP response to curl and perform a denial of service attack by forcing curl to spend enormous amounts of allocated heap memory, or trying to and returning out of memory errors.

6) Use-after-free (CVE-ID: CVE-2022-33981)

The vulnerability allows a local user to perform denial of service attack.

The vulnerability exists due to a use-after-free error in drivers/block/floppy.c in the Linux kernel when deallocating raw_cmd in the raw_cmd_ioctl function(). A local user can trigger use-after-free and perform denial of service attack.

7) Information disclosure (CVE-ID: CVE-2022-33742)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend. A local user can gain unauthorized access to sensitive information on the system.

8) Information disclosure (CVE-ID: CVE-2022-33741)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend. A local user can gain unauthorized access to sensitive information on the system.

9) Information disclosure (CVE-ID: CVE-2022-33740)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend. A local user can gain unauthorized access to sensitive information on the system.

10) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2022-29901)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to the way non-transparent sharing of branch predictor targets between contexts. A local user can exploit the vulnerability to gain access to sensitive information.

11) Information disclosure (CVE-ID: CVE-2022-26365)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend. A local user can gain unauthorized access to sensitive information on the system.

12) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-20154)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to unspecified error in the Linux Kernel. A local user can bypass security restrictions and escalate privileges on the system.

13) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-20141)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper imposition of security restrictions in the Linux kernel's components. A local user can trigger the vulnerability to bypass security restrictions bypass and escalate privileges on the system.

14) Information disclosure (CVE-ID: CVE-2022-20132)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output in the USB HID component in Linux Kernel. A local user can trigger the vulnerability to gain access to potentially sensitive information.

15) Use-after-free (CVE-ID: CVE-2022-2318)

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to a use-after-free error caused by timer handler in net/rose/rose_timer.c of linux. A local user can exploit the vulnerability to perform a denial of service attack.

16) Use-after-free (CVE-ID: CVE-2022-1679)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the ath9k_htc_wait_for_target() function in the Linux kernel’s Atheros wireless adapter driver. A local user can execute arbitrary code with elevated privileges.

17) Memory leak (CVE-ID: CVE-2022-1012)

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient randomization in the net/ipv4/tcp.c when calculating port offsets in Linux kernel cause by small table perturb size. A remote attacker can cause memory leak and gain access to sensitive information.

18) Buffer overflow (CVE-ID: CVE-2021-4157)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the Linux kernel NFS subsystem. A remote attacker can create a specially crafted data and crash the system or escalate privileges on the system

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

19) Protection Mechanism Failure (CVE-ID: CVE-2020-26541)

The vulnerability allows a local user to escalate privileges on the system.

The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c. A local user can escalate privileges on the system.

Remediation

Install update from vendor's website.

References

• https://www.dell.com/support/kbdoc/nl-nl/000203560/dsa-2022-266-dell-networker-vproxy-security-update-for-multiple-third-party-vulnerabilities"
• https://www.dell.com/support/kbdoc/nl-nl/000203560/dsa-2022-266-dell-networker-vproxy-security-update-for-multiple-third-party-vulnerabilities</a><br><br></p>