CVE-2017-7184
Linux Kernel XFRM Out-Of-Bounds Access Privilege Escalation Vulnerability
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
The xfrm_replay_verify_len function in net/xfrm/xfrm_user.c in the Linux kernel through 4.10.6 does not validate certain size data after an XFRM_MSG_NEWAE update, which allows local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52.
La función xfrm_replay_verify_len en net/xfrm/xfrm_user.c en el kernel de Linux hasta la versión 4.10.6 no valida ciertos datos de tamaño después de una actualización XFRM_MSG_NEWAE, lo que permite a usuarios locales obtener privilegios de root o provocar una denegación de servicio (acceso fuera de límites basado en memoria dinámica) aprovechando la capacidad CAP_NET_ADMIN, como se demostró durante una competición Pwn2Own en CanSecWest 2017 para el paquete Ubuntu 16.10 linux-image-* 4.8.0.41.52.
Out-of-bounds kernel heap access vulnerability was found in xfrm, kernel's IP framework for transforming packets. An error dealing with netlink messages from an unprivileged user leads to arbitrary read/write and privilege escalation.
This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of the Linux Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the handling of xfrm states. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated buffer. An attacker can leverage this vulnerability to elevate privileges and execute arbitrary code under the context of the kernel.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2017-03-19 CVE Reserved
- 2017-03-19 CVE Published
- 2024-06-19 EPSS Updated
- 2024-08-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-122: Heap-based Buffer Overflow
CAPEC
References (17)
| URL | Tag | Source |
|---|---|---|
| http://openwall.com/lists/oss-security/2017/03/29/2 | Mailing List | |
| http://www.eweek.com/security/ubuntu-linux-falls-on-day-1-of-pwn2own-hacking-competition | Technical Description | |
| http://www.securityfocus.com/bid/97018 | Third Party Advisory | |
| http://www.securitytracker.com/id/1038166 | Third Party Advisory | |
| https://blog.trendmicro.com/results-pwn2own-2017-day-one | Technical Description | |
| https://github.com/torvalds/linux/commit/677e806da4d916052585301785d847c3b3e6186a | Third Party Advisory | |
| https://github.com/torvalds/linux/commit/f843ee6dd019bcece3e74e76ad9df0155655d0df | Third Party Advisory | |
| https://source.android.com/security/bulletin/2017-05-01 | Third Party Advisory | |
| https://twitter.com/thezdi/status/842126074435665920 | Media Coverage |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 4.8 Search vendor "Linux" for product "Linux Kernel" and version "4.8" | - |
Affected
| in | Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 16.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "16.10" | - |
Safe
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 3.2.89 Search vendor "Linux" for product "Linux Kernel" and version " < 3.2.89" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.3 < 3.10.106 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.3 < 3.10.106" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.11 < 3.12.73 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.11 < 3.12.73" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.13 < 3.16.44 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.13 < 3.16.44" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.17 < 3.18.49 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.17 < 3.18.49" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.19 < 4.1.49 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.19 < 4.1.49" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 4.4.59 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.4.59" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.5 < 4.9.20 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.20" | - |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.10 < 4.10.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.10 < 4.10.8" | - |
Affected
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