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Known exploited vulnerability

CVE-2017-1000253

highCVSS 3.1 7.8In CISA KEVRansomwareEPSS 11%Published · n/a

The short answer

CVE-2017-1000253 affects n/a n/a and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2024-09-09: attackers are using it, so patch it first. The vendor has linked a patch.

What it is

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.

Weakness: CWE-119.

Severity

7.8 high

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Sep 9, 2024

Federal due date Sep 30, 2024

EPSS, next 30 days

11%

Higher than 96% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected products

n/a, centos, enterprise_linux, linux_kernel. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2017-1000253 being exploited?

Yes. CISA added CVE-2017-1000253 to its Known Exploited Vulnerabilities catalog on 2024-09-09, with a federal remediation due date of 2024-09-30. CISA lists it as used in ransomware campaigns.

How do I fix CVE-2017-1000253?

CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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