VulnerabilityModified
CVE-2019-14868
An attacker could use this flaw to override or bypass environment restrictions to execute shell commands.
HIGH 7.8EPSS 1.39%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In ksh version 20120801, a flaw was found in the way it evaluates certain environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Services and applications that allow remote unauthenticated attackers to provide one of those environment variables could allow them to exploit this issue remotely.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.39% probability · 71th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-77
- Affected
- ksh project/ksh · debian/debian linux · apple/mac os x
- Source
- secalert@redhat.com
References
- http://seclists.org/fulldisclosure/2020/May/53Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14868Issue Tracking, Third Party Advisory
- https://github.com/att/ast/commit/c7de8b641266bac7c77942239ac659edfee9ecd2Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00015.htmlMailing List, Third Party Advisory
- https://support.apple.com/kb/HT211170Third Party Advisory
- http://seclists.org/fulldisclosure/2020/May/53Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14868Issue Tracking, Third Party Advisory
- https://github.com/att/ast/commit/c7de8b641266bac7c77942239ac659edfee9ecd2Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00015.htmlMailing List, Third Party Advisory
- https://support.apple.com/kb/HT211170Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.