Ubuntu update for musl
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2019-14697 CVE-2020-28928 |
| CWE-ID | CWE-787 CWE-835 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Ubuntu Operating systems & Components / Operating system musl (Ubuntu package) Operating systems & Components / Operating system package or component musl-dev (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Out-of-bounds write
EUVDB-ID: #VU27334
Risk: Medium
CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2019-14697
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to x87 floating-point stack adjustment imbalance, related to the math/i386/ directory. A remote attacker can pass specially crafted data to the application, trigger out-of-bounds write and execute arbitrary code on the target system.
MitigationUpdate the affected package musl to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 20.04
musl (Ubuntu package): before Ubuntu Pro
musl-dev (Ubuntu package): before Ubuntu Pro
CPE2.3- cpe:2.3:o:canonical:ubuntu:14.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:16.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:18.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu:20.04:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:musl_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:o:canonical:musl-dev_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-5990-1
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) Infinite loop
EUVDB-ID: #VU48579
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-2020-28928
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the wcsnrtombs() function in musl libc. A remote attacker can consume all available system resources and cause denial of service conditions.
MitigationUpdate the affected package musl to the latest version.
Vulnerable software versionsUbuntu: 14.04 - 20.04
musl (Ubuntu package): before Ubuntu Pro
musl-dev (Ubuntu package): before Ubuntu Pro
CPE2.3- cpe:2.3:o:canonical:musl_ubuntu_package:*:*:*:*:*:ubuntu:*:*
- cpe:2.3:o:canonical:musl-dev_ubuntu_package:*:*:*:*:*:ubuntu:*:*
https://ubuntu.com/security/notices/USN-5990-1
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.
