CVE-2019-15691
TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.72%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
TigerVNC version prior to 1.10.1 is vulnerable to stack use-after-return, which occurs due to incorrect usage of stack memory in ZRLEDecoder. If decoding routine would throw an exception, ZRLEDecoder may try to access stack variable, which has been already freed during the process of stack unwinding. Exploitation of this vulnerability could potentially result into remote code execution. This attack appear to be exploitable via network connectivity.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.72% probability · 91th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-825, CWE-672
- Affected
- tigervnc/tigervnc · opensuse/leap
- Source
- vulnerability@kaspersky.com
References
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.htmlThird Party Advisory
- https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40Patch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1Release Notes, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2019/12/20/2Exploit, Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.htmlThird Party Advisory
- https://github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40Patch, Third Party Advisory
- https://github.com/TigerVNC/tigervnc/releases/tag/v1.10.1Release Notes, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2019/12/20/2Exploit, Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.