CVE-2017-8843 — The join_pthread function in stream

The join_pthread function in stream.c in liblrzip.so in lrzip 0.631 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted archive.

01What is this vulnerability?

The join_pthread function in stream.c in liblrzip.so in lrzip 0.631 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted archive.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-05-08T14:29:00.200
• Last modified: 2026-05-13T00:24:29.033

09References

• blogs.gentoo.org — https://blogs.gentoo.org/ago/2017/05/07/lrzip-null-pointer-dereference-in-join_p…
• github.com — https://github.com/ckolivas/lrzip/issues/69
• security.gentoo.org — https://security.gentoo.org/glsa/202005-01
• blogs.gentoo.org — https://blogs.gentoo.org/ago/2017/05/07/lrzip-null-pointer-dereference-in-join_p…
• github.com — https://github.com/ckolivas/lrzip/issues/69
• security.gentoo.org — https://security.gentoo.org/glsa/202005-01