ALAS2-2022-1772

Related Vulnerabilities: CVE-2018-25032  

An out-of-bounds access flaw was found in zlib, which allows memory corruption when deflating (ex: when compressing) if the input has many distant matches. For some rare inputs with a large number of distant matches (crafted payloads), the buffer into which the compressed or deflated data is written can overwrite the distance symbol table which it overlays. This issue results in corrupted output due to invalid distances, which leads to out-of-bound access, corrupting the memory and potentially crashing the application. (CVE-2018-25032)

ALAS2-2022-1772


Amazon Linux 2 Security Advisory: ALAS-2022-1772
Advisory Release Date: 2022-04-04 23:23 Pacific
Advisory Updated Date: 2022-04-06 23:15 Pacific
Severity: Important
References: CVE-2018-25032 

Issue Overview:

An out-of-bounds access flaw was found in zlib, which allows memory corruption when deflating (ex: when compressing) if the input has many distant matches. For some rare inputs with a large number of distant matches (crafted payloads), the buffer into which the compressed or deflated data is written can overwrite the distance symbol table which it overlays. This issue results in corrupted output due to invalid distances, which leads to out-of-bound access, corrupting the memory and potentially crashing the application. (CVE-2018-25032)


Affected Packages:

zlib


Issue Correction:
Run yum update zlib to update your system.

New Packages:
aarch64:
    zlib-1.2.7-19.amzn2.0.1.aarch64
    zlib-devel-1.2.7-19.amzn2.0.1.aarch64
    zlib-static-1.2.7-19.amzn2.0.1.aarch64
    minizip-1.2.7-19.amzn2.0.1.aarch64
    minizip-devel-1.2.7-19.amzn2.0.1.aarch64
    zlib-debuginfo-1.2.7-19.amzn2.0.1.aarch64

i686:
    zlib-1.2.7-19.amzn2.0.1.i686
    zlib-devel-1.2.7-19.amzn2.0.1.i686
    zlib-static-1.2.7-19.amzn2.0.1.i686
    minizip-1.2.7-19.amzn2.0.1.i686
    minizip-devel-1.2.7-19.amzn2.0.1.i686
    zlib-debuginfo-1.2.7-19.amzn2.0.1.i686

src:
    zlib-1.2.7-19.amzn2.0.1.src

x86_64:
    zlib-1.2.7-19.amzn2.0.1.x86_64
    zlib-devel-1.2.7-19.amzn2.0.1.x86_64
    zlib-static-1.2.7-19.amzn2.0.1.x86_64
    minizip-1.2.7-19.amzn2.0.1.x86_64
    minizip-devel-1.2.7-19.amzn2.0.1.x86_64
    zlib-debuginfo-1.2.7-19.amzn2.0.1.x86_64