High [CVE-2020-1751] out-of-bounds write vulnerability was found in glibc before 2.31 when handling signal trampolines on PowerPC
This high-severity Red Hat Linux advisory covers CVE-2020-1751 affecting Red Hat Enterprise Linux 8, Red Hat package: glibc.
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Summary
An out-of-bounds write vulnerability was found in glibc before 2.31 when handling signal trampolines on PowerPC. Specifically, the backtrace function did not properly check the array bounds when storing the frame address, resulting in a denial of service or potential code execution.
The highest threat from this vulnerability is to system availability. This flaw did not affect the versions of `glibc` as shipped with Red Hat Enterprise Linux 5, 6, and 7, as they did not include the vulnerable code, which was introduced in a later version of the package.
Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-787.
Affected Red Hat products: Red Hat Enterprise Linux 8. Red Hat fixing advisory: RHSA-2020:4444.
Affected products named by the advisory: Red Hat package: glibc.
- < 2.31
Official advisory · high-confidence parse· fetched 15 hours ago·verify at source
- glibc-0:2.28-127.el8
- RHSA-2020:4444
Official advisory · high-confidence parse· fetched 15 hours ago·verify at source
Mitigation
Upgrade to a fixed release: glibc-0:2.28-127.el8, RHSA-2020:4444. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 15 hours ago·verify at source
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