Use After Free Affecting nss-sysinit package, versions <0:3.28.4-12.80.amzn1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN201803-NSSSYSINIT-1708861
- published27 Sept 2021
- disclosed11 Jun 2018
Introduced: 11 Jun 2018
CVE-2017-7805 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2018.03 nss-sysinit 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-sysinit package and not the nss-sysinit 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.
References
- http://www.securityfocus.com/bid/101059
- https://bugzilla.mozilla.org/show_bug.cgi?id=1377618
- https://www.mozilla.org/security/advisories/mfsa2017-21/
- https://www.mozilla.org/security/advisories/mfsa2017-22/
- https://www.mozilla.org/security/advisories/mfsa2017-23/
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7805
- https://www.debian.org/security/2017/dsa-3987
- https://www.debian.org/security/2017/dsa-3998
- https://www.debian.org/security/2017/dsa-4014
- https://security.gentoo.org/glsa/201803-14
- https://lists.debian.org/debian-lts-announce/2017/11/msg00000.html
- https://access.redhat.com/errata/RHSA-2017:2832
- http://www.securitytracker.com/id/1039465