Gentoo update for GNU C Library
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2015-5180 CVE-2016-6323 CVE-2017-1000366 |
| CWE-ID | CWE-476 CWE-284 CWE-119 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #3 is available. |
| Vulnerable software |
Gentoo Linux Operating systems & Components / Operating system |
| Vendor | Gentoo |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) NULL pointer dereference
EUVDB-ID: #VU12269
Risk: Low
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2015-5180
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in res_query in libresolv due to NULL pointer dereference. A remote attacker can cause the service to crash.
Update the affected packages.
sys-libs/glibc to version: 2.23-r4
Gentoo Linux: All versions
CPE2.3 External linkshttps://security.gentoo.org/
https://security.gentoo.org/glsa/201706-19
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) Improper access control
EUVDB-ID: #VU40079
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-2016-6323
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The makecontext function in the GNU C Library (aka glibc or libc6) before 2.25 creates execution contexts incompatible with the unwinder on ARM EABI (32-bit) platforms, which might allow context-dependent attackers to cause a denial of service (hang), as demonstrated by applications compiled using gccgo, related to backtrace generation.
MitigationUpdate the affected packages.
sys-libs/glibc to version: 2.23-r4
Gentoo Linux: All versions
CPE2.3 External linkshttps://security.gentoo.org/
https://security.gentoo.org/glsa/201706-19
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 corruption
EUVDB-ID: #VU7135
Risk: Medium
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:Green]
CVE-ID: CVE-2017-1000366
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: Yes
Description
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to memory management errors in implementation of various functions under multiple operating systems. A local or remote attacker can trigger the affected application to process specially crafted LD_LIBRARY_PATH values to manipulate the heap/stack, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationUpdate the affected packages.
sys-libs/glibc to version: 2.23-r4
Gentoo Linux: All versions
CPE2.3 External linkshttps://security.gentoo.org/
https://security.gentoo.org/glsa/201706-19
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.
