Gentoo update for GNU C Library
| 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 |
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
CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-35942
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe 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.
MitigationUpdate the affected packages.
sys-libs/glibc to version: 2.34
Gentoo Linux: All versions
sys-libs/glibc: before 2.34
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202208-24
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) NULL pointer dereference
EUVDB-ID: #VU55916
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-38604
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe 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.
MitigationUpdate the affected packages.
sys-libs/glibc to version: 2.34
Gentoo Linux: All versions
sys-libs/glibc: before 2.34
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202208-24
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Memory leak
EUVDB-ID: #VU61292
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-3998
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe 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.
MitigationUpdate the affected packages.
sys-libs/glibc to version: 2.34
Gentoo Linux: All versions
sys-libs/glibc: before 2.34
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202208-24
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Off-by-one
EUVDB-ID: #VU61293
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2021-3999
CWE-ID:
CWE-193 - Off-by-one Error
Exploit availability: No
DescriptionThe 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.
Update the affected packages.
sys-libs/glibc to version: 2.34
Gentoo Linux: All versions
sys-libs/glibc: before 2.34
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202208-24
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
5) Buffer overflow
EUVDB-ID: #VU61294
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2022-23218
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe 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.
MitigationUpdate the affected packages.
sys-libs/glibc to version: 2.34
Gentoo Linux: All versions
sys-libs/glibc: before 2.34
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202208-24
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
6) Buffer overflow
EUVDB-ID: #VU61295
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2022-23219
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe 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.
MitigationUpdate the affected packages.
sys-libs/glibc to version: 2.34
Gentoo Linux: All versions
sys-libs/glibc: before 2.34
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202208-24
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
