Gentoo update for libmicrodns
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 7 |
| CVE-ID | CVE-2020-6071 CVE-2020-6072 CVE-2020-6073 CVE-2020-6077 CVE-2020-6078 CVE-2020-6079 CVE-2020-6080 |
| CWE-ID | CWE-674 CWE-252 CWE-190 CWE-125 CWE-400 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Gentoo Linux Operating systems & Components / Operating system |
| Vendor | Gentoo |
Security Bulletin
This security bulletin contains information about 7 vulnerabilities.
1) Uncontrolled Recursion
EUVDB-ID: #VU26342
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-6071
CWE-ID:
CWE-674 - Uncontrolled Recursion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the compression pointer is followed without checking for recursion in the resource record-parsing functionality when parsing compressed labels in mDNS messages. A remote attacker can send a specially crafted mDNS message and cause a denial of service condition on the target system.
MitigationUpdate the affected packages.
net-libs/libmicrodns to version: 0.1.2
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202005-10
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) Unchecked Return Value
EUVDB-ID: #VU26336
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-6072
CWE-ID:
CWE-252 - Unchecked Return Value
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists within the label-parsing functionality due to the "rr_decode" function's return value is not checked when parsing compressed labels in mDNS messages. A remote attacker can send a specially crafted mDNS message and execute arbitrary code on the target system.
MitigationUpdate the affected packages.
net-libs/libmicrodns to version: 0.1.2
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202005-10
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) Integer overflow
EUVDB-ID: #VU26339
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-6073
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow in the TXT record-parsing functionality when parsing the RDATA section in a TXT record in mDNS messages. A remote attacker can send a specially crafted mDNS message, trigger integer overflow and cause a denial of service condition on the target system.
Update the affected packages.
net-libs/libmicrodns to version: 0.1.2
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202005-10
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) Out-of-bounds read
EUVDB-ID: #VU26337
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-6077
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS).
The vulnerability exists within the message-parsing functionality due to a boundary condition when parsing mDNS messages. A remote attacker can send a specially crafted mDNS message, trigger out-of-bounds read error and cause a denial of service condition on the target system.
MitigationUpdate the affected packages.
net-libs/libmicrodns to version: 0.1.2
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202005-10
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) Unchecked Return Value
EUVDB-ID: #VU26338
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-6078
CWE-ID:
CWE-252 - Unchecked Return Value
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists within the message-parsing functionality due to the "mdns_read_header" function is not checked when parsing mDNS messages in "mdns_recv". A remote attacker can send a specially crafted mDNS message and cause a denial of service condition on the target system.
MitigationUpdate the affected packages.
net-libs/libmicrodns to version: 0.1.2
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202005-10
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) Resource exhaustion
EUVDB-ID: #VU26340
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-6079
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to encountering errors while parsing mDNS messages in the "rr_decode" function in the resource allocation handling. A remote attacker can send mDNS messages, trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationUpdate the affected packages.
net-libs/libmicrodns to version: 0.1.2
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202005-10
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.
7) Resource exhaustion
EUVDB-ID: #VU26341
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-6080
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to encountering errors while parsing mDNS messages in the "rr_read_TXT" function in the resource allocation handling. A remote attacker can send mDNS messages, trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationUpdate the affected packages.
net-libs/libmicrodns to version: 0.1.2
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/202005-10
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.
