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Use After Free Affecting nss-debuginfo package, versions <0:3.28.4-12.80.amzn1

Severity

 Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
3.05% (88th percentile)

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  • Snyk IDSNYK-AMZN201803-NSSDEBUGINFO-1708786
  • published27 Sept 2021
  • disclosed11 Jun 2018
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Introduced: 11 Jun 2018

CVE-2017-7805  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 nss-debuginfo to version 0:3.28.4-12.80.amzn1 or higher.
This issue was patched in ALAS-2017-911.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nss-debuginfo package and not the nss-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.