Vulnerability Details : CVE-2017-16939
Potential exploit
The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2017-16939
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-16939
7.93%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 91 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-16939
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2017-16939
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-16939
-
https://blogs.securiteam.com/index.php/archives/3535
SSD Advisory – Linux Kernel XFRM Privilege Escalation - SSD Secure DisclosureExploit;Patch;Third Party Advisory
-
https://www.debian.org/security/2018/dsa-4082
Debian -- Security Information -- DSA-4082-1 linuxThird Party Advisory
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https://access.redhat.com/errata/RHSA-2019:1170
RHSA-2019:1170 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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https://access.redhat.com/errata/RHSA-2018:1355
RHSA-2018:1355 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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http://www.securityfocus.com/bid/101954
Linux Kernel CVE-2017-16939 Local Privilege Escalation VulnerabilityThird Party Advisory;VDB Entry
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https://bugzilla.suse.com/show_bug.cgi?id=1069702
Bug 1069702 – VUL-0: CVE-2017-16939: kernel-source: local privilege escalation with XFRM socketsIssue Tracking;Third Party Advisory
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http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
[security-announce] SUSE-SU-2018:0011-1: important: Security update forMailing List;Third Party Advisory
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https://access.redhat.com/errata/RHSA-2018:1318
RHSA-2018:1318 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
[SECURITY] [DLA 1200-1] linux security updateThird Party Advisory
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http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
Patch;Vendor Advisory
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http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2
kernel/git/torvalds/linux.git - Linux kernel source treeTechnical Description;Patch
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https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df2
ipsec: Fix aborted xfrm policy dump crash · torvalds/linux@1137b5e · GitHubPatch;Third Party Advisory
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http://seclists.org/fulldisclosure/2017/Nov/40
Full Disclosure: SSD Advisory – Linux Kernel XFRM Privilege EscalationMailing List;Third Party Advisory
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https://access.redhat.com/errata/RHSA-2019:1190
RHSA-2019:1190 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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