CVE-2019-15691: kaspersky tigervnc Expired Pointer Dereference
Vulnerability summary
CVE-2019-15691 is a high (CVSS 7.2) Expired Pointer Dereference vulnerability in kaspersky tigervnc. EPSS estimates a 4.72% chance of exploitation in the next 30 days, higher than 91.7% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 10 · Related 7Timeline
- 26-12-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.2HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.2HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
4.72%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
0.00 pp
From 4.72% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (openwall.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-825Expired Pointer DereferenceThe product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.
- CWE-672Operation on a Resource after Expiration or ReleaseThe product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked.
Affected systems
Debian1 product
- tigervnc< 1.10.1+dfsg-1
Kaspersky1 product
- tigervnc1.10.0
Opensuse1 product
- leapEOL15.1
Tigervnc1 product
- tigervnc< 1.10.1
Ubuntu1 product
- tigervncAll versions (No fix recorded)
5 vendors · 5 products
References
9 links- github.com/CendioOssman/tigervnc/commit/d61a767d6842b530ffb532ddd5a3d233119aad40X Refsource MISCPatchThird Party AdvisoryREPORT
- github.com/TigerVNC/tigervnc/releases/tag/v1.10.1X Refsource MISCRelease NotesThird Party AdvisoryREPORT
- www.openwall.com/lists/oss-security/2019/12/20/2Mailing ListX Refsource MLISTExploitThird Party AdvisoryREPORT
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00039.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
