Gentoo update for libxml2
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 8 |
| CVE-ID | CVE-2016-9318 CVE-2017-0663 CVE-2017-5969 CVE-2017-7375 CVE-2017-9047 CVE-2017-9048 CVE-2017-9049 CVE-2017-9050 |
| CWE-ID | CWE-611 CWE-787 CWE-20 CWE-119 CWE-121 CWE-126 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #5 is available. Public exploit code for vulnerability #6 is available. Public exploit code for vulnerability #7 is available. Public exploit code for vulnerability #8 is available. |
| Vulnerable software Subscribe |
Gentoo Linux Operating systems & Components / Operating system |
| Vendor | Gentoo |
Security Bulletin
This security bulletin contains information about 8 vulnerabilities.
1) XML External Entity injection
EUVDB-ID: #VU31830
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2016-9318
CWE-ID:
CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')
Exploit availability: No
DescriptionThe vulnerability allows a local non-authenticated attacker to execute arbitrary code.
libxml2 2.9.4 and earlier, as used in XMLSec 1.2.23 and earlier and other products, does not offer a flag directly indicating that the current document may be read but other files may not be opened, which makes it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.
MitigationUpdate the affected packages.
dev-libs/libxml2 to version: 2.9.4-r3
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/201711-01
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.
2) Out-of-bounds write
EUVDB-ID: #VU38871
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-0663
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
A remote code execution vulnerability in libxml2 could enable an attacker using a specially crafted file to execute arbitrary code within the context of an unprivileged process. This issue is rated as High due to the possibility of remote code execution in an application that uses this library. Product: Android. Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2. Android ID: A-37104170.
MitigationUpdate the affected packages.
dev-libs/libxml2 to version: 2.9.4-r3
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/201711-01
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.
3) Input validation error
EUVDB-ID: #VU32077
Risk: Medium
CVSSv3.1: 4.1 [CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-5969
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows remote attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference) via a crafted XML document.
MitigationUpdate the affected packages.
dev-libs/libxml2 to version: 2.9.4-r3
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/201711-01
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) XXE attack
EUVDB-ID: #VU11229
Risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-7375
CWE-ID:
CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to perform XXE attack on the target system.
The weakness exists in the xmlParsePEReference function due to insufficient validation for external entities. A remote attacker can perform XXE attack and gain access to potentially sensitive information.
Update the affected packages.
dev-libs/libxml2 to version: 2.9.4-r3
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/201711-01
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.
5) Memory corruption
EUVDB-ID: #VU9687
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
CVE-ID: CVE-2017-9047
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the xmlSnprintfElementContent function of XMLSoft libxml2 due to improper memory handling by the valid.c source code. A remote attacker can send a specially crafted XML file, trigger memory corruption and cause the service to crash.
Successful exploitation of the vulnerability results in denial of service.
Update the affected packages.
dev-libs/libxml2 to version: 2.9.4-r3
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/201711-01
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. However, proof of concept for this vulnerability is available.
6) Stack-based buffer overflow
EUVDB-ID: #VU9691
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
CVE-ID: CVE-2017-9048
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the xmlSnprintfElementContent function of XMLSoft libxml2 due to improper bounds checking in the valid.c code. A remote attacker can send a specially crafted request, trigger stack-based buffer overflow condition and cause the service to crash.
Successful exploitation of the vulnerability results in denial of service.
Update the affected packages.
dev-libs/libxml2 to version: 2.9.4-r3
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/201711-01
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. However, proof of concept for this vulnerability is available.
7) Heap-based buffer over-read
EUVDB-ID: #VU9688
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
CVE-ID: CVE-2017-9049
CWE-ID:
CWE-126 - Buffer over-read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the xmlDictComputeFastKey function of XMLSoft libxml2 due to improper bounds checking in the dict.c code. A remote attacker can send a specially crafted request, trigger heap-based buffer over-read condition and cause the service to crash.
Successful exploitation of the vulnerability results in denial of service.
Update the affected packages.
dev-libs/libxml2 to version: 2.9.4-r3
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/201711-01
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. However, proof of concept for this vulnerability is available.
8) Heap-based buffer over-read
EUVDB-ID: #VU9689
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
CVE-ID: CVE-2017-9050
CWE-ID:
CWE-126 - Buffer over-read
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the xmlDictAddString function of XMLSoft libxml2 due to improper bounds checking in the dict.c code. A remote attacker can send a specially crafted request, trigger heap-based buffer over-read condition and cause the service to crash.
Successful exploitation of the vulnerability results in denial of service.
Update the affected packages.
dev-libs/libxml2 to version: 2.9.4-r3
Gentoo Linux: All versions
External linkshttp://security.gentoo.org/
http://security.gentoo.org/glsa/201711-01
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. However, proof of concept for this vulnerability is available.
