Actively exploited · Published Oct 4, 2017 · Assigned by mitre
CVE-2017-1000253
High 7.8 Exploited Ransomware
In plain English
A high-severity memory corruption in Kernel from Linux. Attackers are actively exploiting it in the wild (listed by CISA on September 9, 2024). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 10.7% (higher than 96% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
CISA guidance
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Sep 30, 2024.
Official description
Linux distributions that have not patched their long-term kernels with https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (committed on April 14, 2015). This kernel vulnerability was fixed in April 2015 by commit a87938b2e246b81b4fb713edb371a9fa3c5c3c86 (backported to Linux 3.10.77 in May 2015), but it was not recognized as a security threat. With CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE enabled, and a normal top-down address allocation strategy, load_elf_binary() will attempt to map a PIE binary into an address range immediately below mm->mmap_base. Unfortunately, load_elf_ binary() does not take account of the need to allocate sufficient space for the entire binary which means that, while the first PT_LOAD segment is mapped below mm->mmap_base, the subsequent PT_LOAD segment(s) end up being mapped above mm->mmap_base into the are that is supposed to be the "gap" between the stack and the binary.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 4.0.2-1 | DEBIAN-CVE-2017-1000253 |
| Debian:13 | linux | 4.0.2-1 | DEBIAN-CVE-2017-1000253 |
| Debian:14 | linux | 4.0.2-1 | DEBIAN-CVE-2017-1000253 |
Affected products (as reported)
Weakness: CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- RHSA-2017:2798 vendor-advisory, x_refsource_REDHAT
- RHSA-2017:2795 vendor-advisory, x_refsource_REDHAT
- 1039434 vdb-entry, x_refsource_SECTRACK
- RHSA-2017:2801 vendor-advisory, x_refsource_REDHAT
- RHSA-2017:2796 vendor-advisory, x_refsource_REDHAT
- 101010 vdb-entry, x_refsource_BID
- RHSA-2017:2799 vendor-advisory, x_refsource_REDHAT
- RHSA-2017:2794 vendor-advisory, x_refsource_REDHAT
- RHSA-2017:2793 vendor-advisory, x_refsource_REDHAT
- RHSA-2017:2797 vendor-advisory, x_refsource_REDHAT
- RHSA-2017:2802 vendor-advisory, x_refsource_REDHAT
- https://www.qualys.com/2017/09/26/cve-2017-1000253/cve-2017-1000253.txt x_refsource_MISC
- RHSA-2017:2800 vendor-advisory, x_refsource_REDHAT
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-1000253 government-resource