Episode 123

Ubuntu Security Podcast

Вміст надано Alex Murray and Ubuntu Security Team. Весь вміст подкастів, включаючи епізоди, графіку та описи подкастів, завантажується та надається безпосередньо компанією Alex Murray and Ubuntu Security Team або його партнером по платформі подкастів. Якщо ви вважаєте, що хтось використовує ваш захищений авторським правом твір без вашого дозволу, ви можете виконати процедуру, описану тут https://uk.player.fm/legal.

3y ago 8:57

MP3•Головна епізоду

Overview

Is npm audit more harm than good? Plus this week we look at security updates for DjVuLibre, libuv, PHP and more.

This week in Ubuntu Security Updates

8 unique CVEs addressed

[USN-4905-2] X.Org X Server vulnerability [00:42]

1 CVEs addressed in Trusty ESM (14.04 ESM)
- CVE-2021-3472
Episode 112 - Local user (X client) could crash the server via Xinput extension and ChangeFeedbackControl request - integer underflow -> heap buffer overflow

[USN-5005-1] DjVuLibre vulnerability [01:26]

1 CVEs addressed in Xenial ESM (16.04 ESM), Bionic (18.04 LTS)
- CVE-2021-3630
OOB write via crafted djvu file -> crash -> DoS, RCE

[USN-5007-1] libuv vulnerability [01:53]

1 CVEs addressed in Focal (20.04 LTS), Groovy (20.10), Hirsute (21.04)
- CVE-2021-22918
Async event handling library - used by nodejs and others - supports async handling TCP/UDP sockets, DNS resolution, file system operations etc
OOB read when converting strings to ASCII -> can be triggered via calls to uv_getaddrinfo() which are done by clients who handle TCP/UDP sockets async (ie nodejs, Julia,, BIND etc)

[USN-5006-1] PHP vulnerabilities [03:04]

5 CVEs addressed in Bionic (18.04 LTS), Focal (20.04 LTS), Groovy (20.10), Hirsute (21.04)
UAF in PHAR archive handling - generally these are trusted so low impact
mishandling of URLs with embedded passwords - unspecified impact but could misparse the URL and cause unwanted behaviour
Mishandling of XML when processing SOAP server responses -> NULL ptr deref (so malicious server could trigger a crash) -> DoS
Ability to bypass Sever Side Request Forgery (SSRF) protections in FILTER_VALIDATE_URL

Goings on in Ubuntu Security Community

npm audit broken by design? [04:13]

https://overreacted.io/npm-audit-broken-by-design/

Ubuntu Security Podcast on break for next 2 weeks [07:56]

Get in contact

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#Alex Murray #Ubuntu Security Team #Linux #Tech #Operating Systems #Alex and Joe #Security #Software Development

Episode 123

Ubuntu Security Podcast

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published 3y ago