Gentoo update for GNU C Library



Published: 2022-08-14
Risk High
Patch available YES
Number of vulnerabilities 6
CVE-ID CVE-2021-35942
CVE-2021-38604
CVE-2021-3998
CVE-2021-3999
CVE-2022-23218
CVE-2022-23219
CWE-ID CWE-190
CWE-476
CWE-401
CWE-193
CWE-119
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Gentoo Linux
Operating systems & Components / Operating system

sys-libs/glibc
Operating systems & Components / Operating system package or component

Vendor Gentoo

Security Bulletin

This security bulletin contains information about 6 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU55972

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-35942

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to sensitive information or perform a DoS attack.

The vulnerability exists due to integer overflow in parse_param in posix/wordexp.c in the GNU C Library when called with an untrusted pattern. A remote attacker can pass specially crafted data to the application, trigger integer overflow and read arbitrary memory on the system of perform a denial of service (DoS) attack.

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

Mitigation

Update the affected packages.
sys-libs/glibc to version: 2.34

Vulnerable software versions

Gentoo Linux: All versions

sys-libs/glibc: before 2.34


CPE2.3 External links

http://security.gentoo.org/glsa/202208-24

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) NULL pointer dereference

EUVDB-ID: #VU55916

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-38604

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in the "sysdeps/unix/sysv/linux/mq_notify.c" file within NOTIFY_REMOVED data. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Update the affected packages.
sys-libs/glibc to version: 2.34

Vulnerable software versions

Gentoo Linux: All versions

sys-libs/glibc: before 2.34


CPE2.3 External links

http://security.gentoo.org/glsa/202208-24

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Memory leak

EUVDB-ID: #VU61292

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-3998

CWE-ID: CWE-401 - Improper Release of Memory Before Removing Last Reference ('Memory Leak')

Exploit availability: No

Description

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

The vulnerability exists due memory leak in glibc realpath() function. A remote attacker can force the application to leak memory and perform denial of service attack or gain access to sensitive information.

Mitigation

Update the affected packages.
sys-libs/glibc to version: 2.34

Vulnerable software versions

Gentoo Linux: All versions

sys-libs/glibc: before 2.34


CPE2.3 External links

http://security.gentoo.org/glsa/202208-24

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

4) Off-by-one

EUVDB-ID: #VU61293

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-3999

CWE-ID: CWE-193 - Off-by-one Error

Exploit availability: No

Description

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

The vulnerability exists due to an off-by-one error glibc getcwd() function. A remote attacker can pass specially crafted input to the application that is using the affected library version, trigger an off-by-one error and execute arbitrary code on the target system.


Mitigation

Update the affected packages.
sys-libs/glibc to version: 2.34

Vulnerable software versions

Gentoo Linux: All versions

sys-libs/glibc: before 2.34


CPE2.3 External links

http://security.gentoo.org/glsa/202208-24

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

5) Buffer overflow

EUVDB-ID: #VU61294

Risk: High

CVSSv3.1:

CVE-ID: CVE-2022-23218

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the svcunix_create() in the sunrpc module ib glibc. A remote attacker can pass specially crafted input to the application that is using the affected library version, trigger memory corruption and execute arbitrary code on the target system.

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

Mitigation

Update the affected packages.
sys-libs/glibc to version: 2.34

Vulnerable software versions

Gentoo Linux: All versions

sys-libs/glibc: before 2.34


CPE2.3 External links

http://security.gentoo.org/glsa/202208-24

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

6) Buffer overflow

EUVDB-ID: #VU61295

Risk: High

CVSSv3.1:

CVE-ID: CVE-2022-23219

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the clnt_create() function in the sunrpc module. A remote attacker can pass specially crafted input to the application that is using the affected library version, trigger memory corruption and execute arbitrary code on the target system.

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

Mitigation

Update the affected packages.
sys-libs/glibc to version: 2.34

Vulnerable software versions

Gentoo Linux: All versions

sys-libs/glibc: before 2.34


CPE2.3 External links

http://security.gentoo.org/glsa/202208-24

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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