Gentoo update for glibc
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2023-5156 CVE-2023-6246 CVE-2023-6779 CVE-2023-6780 |
| CWE-ID | CWE-401 CWE-122 CWE-193 CWE-190 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #2 is available. |
| 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 4 vulnerabilities.
1) Memory leak
EUVDB-ID: #VU81448
Risk: Medium
CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2023-5156
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak caused by an incorrect fix for #VU81447 (CVE-2023-4806). A remote attacker can force the application to leak memory and perform denial of service attack.
MitigationUpdate the affected packages.
sys-libs/glibc to version: 2.38-r10
Gentoo Linux: All versions
sys-libs/glibc: before 2.38-r10
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202402-01
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) Heap-based buffer overflow
EUVDB-ID: #VU85932
Risk: Low
CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2023-6246
CWE-ID:
CWE-122 - Heap-based Buffer Overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the __vsyslog_internal() function, which is called by both syslog() and vsyslog() while printing the SYSLOG_HEADER containing a long program name. A local user can pass a specially crafted input as arguments to the affected application, trigger a heap-based buffer overflow and execute arbitrary code on the system.
Mitigation
Update the affected packages.
sys-libs/glibc to version: 2.38-r10
Gentoo Linux: All versions
sys-libs/glibc: before 2.38-r10
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202402-01
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
3) Off-by-one
EUVDB-ID: #VU85934
Risk: Low
CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2023-6779
CWE-ID:
CWE-193 - Off-by-one Error
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to an off-by-one error within the __vsyslog_internal() function. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.
Update the affected packages.
sys-libs/glibc to version: 2.38-r10
Gentoo Linux: All versions
sys-libs/glibc: before 2.38-r10
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202402-01
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) Integer overflow
EUVDB-ID: #VU85935
Risk: Low
CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2023-6780
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer overflow within the __vsyslog_internal() function. A local user can pass specially crafted input to the affected application, trigger an integer overflow and execute arbitrary code with elevated privileges.
Update the affected packages.
sys-libs/glibc to version: 2.38-r10
Gentoo Linux: All versions
sys-libs/glibc: before 2.38-r10
CPE2.3- cpe:2.3:o:gentoo:gentoo_linux:*:*:*:*:*:*:*:*
- cpe:2.3:o:gentoo:sys-libs_glibc:*:*:*:*:*:gentoo_linux:*:*
https://security.gentoo.org/glsa/202402-01
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
